diff --git a/lib/__init__.py b/lib/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/neptune/__init__.py b/lib/neptune/__init__.py
new file mode 100644
index 00000000..c1ae1103
--- /dev/null
+++ b/lib/neptune/__init__.py
@@ -0,0 +1,16 @@
+import logging
+
+from . import joint_inference
+from .context import context
+
+
+def log_configure():
+    logging.basicConfig(
+        format='[%(asctime)s][%(name)s][%(levelname)s][%(lineno)s]: '
+               '%(message)s',
+        level=logging.INFO)
+
+
+LOG = logging.getLogger(__name__)
+
+log_configure()
diff --git a/lib/neptune/common/__init__.py b/lib/neptune/common/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/neptune/common/config.py b/lib/neptune/common/config.py
new file mode 100644
index 00000000..c8087b75
--- /dev/null
+++ b/lib/neptune/common/config.py
@@ -0,0 +1,23 @@
+import os
+
+
+class BaseConfig:
+    """The base config, the value can not be changed."""
+    # dataset
+    train_dataset_url = os.getenv("TRAIN_DATASET_URL")
+    test_dataset_url = os.getenv("TEST_DATASET_URL")
+    # k8s crd info
+    namespace = os.getenv("NAMESPACE", "")
+    worker_name = os.getenv("WORKER_NAME", "")
+    service_name = os.getenv("SERVICE_NAME", "")
+
+    model_url = os.getenv("MODEL_URL")
+
+    # user parameter
+    parameters = os.getenv("PARAMETERS")
+    # Hard Example Mining Algorithm
+    hem_name = os.getenv("HEM_NAME")
+    hem_parameters = os.getenv("HEM_PARAMETERS")
+
+    def __init__(self):
+        pass
diff --git a/lib/neptune/common/constant.py b/lib/neptune/common/constant.py
new file mode 100644
index 00000000..6f5e972e
--- /dev/null
+++ b/lib/neptune/common/constant.py
@@ -0,0 +1,23 @@
+import logging
+from enum import Enum
+
+LOG = logging.getLogger(__name__)
+
+
+class Framework(Enum):
+    Tensorflow = "tensorflow"
+    Pytorch = "pytorch"
+    Mindspore = "mindspore"
+
+
+class K8sResourceKind(Enum):
+    JOINT_INFERENCE_SERVICE = "jointinferenceservice"
+
+
+class K8sResourceKindStatus(Enum):
+    COMPLETED = "completed"
+    FAILED = "failed"
+    RUNNING = "running"
+
+
+FRAMEWORK = Framework.Tensorflow  # TODO: should read from env.
diff --git a/lib/neptune/context.py b/lib/neptune/context.py
new file mode 100644
index 00000000..3d69c29b
--- /dev/null
+++ b/lib/neptune/context.py
@@ -0,0 +1,53 @@
+import json
+import logging
+
+from neptune.common.config import BaseConfig
+
+LOG = logging.getLogger(__name__)
+
+
+def parse_parameters(parameters):
+    """
+    :param parameters:
+    [{"key":"batch_size","value":"32"},
+    {"key":"learning_rate","value":"0.001"},
+    {"key":"min_node_number","value":"3"}]
+    ---->
+    :return:
+    {'batch_size':32, 'learning_rate':0.001, 'min_node_number'=3}
+    """
+    p = {}
+    if parameters is None or len(parameters) == 0:
+        LOG.info(f"PARAMETERS={parameters}, return empty dict.")
+        return p
+    j = json.loads(parameters)
+    for d in j:
+        p[d.get('key')] = d.get('value')
+    return p
+
+
+class Context:
+    """The Context provides the capability of obtaining the context of the
+    `PARAMETERS` and `HEM_PARAMETERS` field"""
+
+    def __init__(self):
+        self.parameters = parse_parameters(BaseConfig.parameters)
+        self.hem_parameters = parse_parameters(BaseConfig.hem_parameters)
+
+    def get_context(self):
+        return self.parameters
+
+    def get_parameters(self, param, default=None):
+        """get the value of the key `param` in `PARAMETERS`,
+        if not exist, the default value is returned"""
+        value = self.parameters.get(param)
+        return value if value else default
+
+    def get_hem_parameters(self, param, default=None):
+        """get the value of the key `param` in `HEM_PARAMETERS`,
+        if not exist, the default value is returned"""
+        value = self.hem_parameters.get(param)
+        return value if value else default
+
+
+context = Context()
diff --git a/lib/neptune/hard_example_mining/__init__.py b/lib/neptune/hard_example_mining/__init__.py
new file mode 100644
index 00000000..66d173da
--- /dev/null
+++ b/lib/neptune/hard_example_mining/__init__.py
@@ -0,0 +1,3 @@
+from .base import BaseFilter, ThresholdFilter
+from .image_classification.hard_mine_filters import CrossEntropyFilter
+from .object_detection.scores_filters import IBTFilter
diff --git a/lib/neptune/hard_example_mining/base.py b/lib/neptune/hard_example_mining/base.py
new file mode 100644
index 00000000..1633e599
--- /dev/null
+++ b/lib/neptune/hard_example_mining/base.py
@@ -0,0 +1,31 @@
+class BaseFilter:
+    """The base class to define unified interface."""
+
+    def hard_judge(self, infer_result=None):
+        """predict function, and it must be implemented by
+        different methods class.
+
+        :param infer_result: prediction result
+        :return: `True` means hard sample, `False` means not a hard sample.
+        """
+        raise NotImplementedError
+
+
+class ThresholdFilter(BaseFilter):
+    def __init__(self, threshold=0.5):
+        self.threshold = threshold
+
+    def hard_judge(self, infer_result=None):
+        """
+        :param infer_result: [N, 6], (x0, y0, x1, y1, score, class)
+        :return: `True` means hard sample, `False` means not a hard sample.
+        """
+        if not infer_result:
+            return True
+
+        image_score = 0
+        for bbox in infer_result:
+            image_score += bbox[4]
+
+        average_score = image_score / (len(infer_result) or 1)
+        return average_score < self.threshold
diff --git a/lib/neptune/hard_example_mining/hard_example_helpers/__init__.py b/lib/neptune/hard_example_mining/hard_example_helpers/__init__.py
new file mode 100644
index 00000000..53357663
--- /dev/null
+++ b/lib/neptune/hard_example_mining/hard_example_helpers/__init__.py
@@ -0,0 +1 @@
+from .data_check_utils import data_check
diff --git a/lib/neptune/hard_example_mining/hard_example_helpers/data_check_utils.py b/lib/neptune/hard_example_mining/hard_example_helpers/data_check_utils.py
new file mode 100644
index 00000000..90794585
--- /dev/null
+++ b/lib/neptune/hard_example_mining/hard_example_helpers/data_check_utils.py
@@ -0,0 +1,8 @@
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def data_check(data):
+    """Check the data in [0,1]."""
+    return 0 <= float(data) <= 1
diff --git a/lib/neptune/hard_example_mining/image_classification/__init__.py b/lib/neptune/hard_example_mining/image_classification/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/neptune/hard_example_mining/image_classification/hard_mine_filters.py b/lib/neptune/hard_example_mining/image_classification/hard_mine_filters.py
new file mode 100644
index 00000000..ddbe0c51
--- /dev/null
+++ b/lib/neptune/hard_example_mining/image_classification/hard_mine_filters.py
@@ -0,0 +1,53 @@
+import logging
+import math
+
+from neptune.hard_example_mining import BaseFilter
+from neptune.hard_example_mining.hard_example_helpers import data_check
+
+logger = logging.getLogger(__name__)
+
+
+class CrossEntropyFilter(BaseFilter):
+    """ Implement the hard samples discovery methods named IBT
+    (image-box-thresholds).
+
+    :param threshold_cross_entropy: threshold_cross_entropy to filter img,
+                        whose hard coefficient is less than
+                        threshold_cross_entropy. And its default value is
+                        threshold_cross_entropy=0.5
+    """
+
+    def __init__(self, threshold_cross_entropy=0.5):
+        self.threshold_cross_entropy = threshold_cross_entropy
+
+    def hard_judge(self, infer_result=None):
+        """judge the img is hard sample or not.
+
+        :param infer_result:
+            prediction classes list,
+                such as [class1-score, class2-score, class2-score,....],
+                where class-score is the score corresponding to the class,
+                class-score value is in [0,1], who will be ignored if its value
+                 not in [0,1].
+        :return: `True` means a hard sample, `False` means not a hard sample.
+        """
+        if infer_result is None:
+            logger.warning(f'infer result is invalid, value: {infer_result}!')
+            return False
+        elif len(infer_result) == 0:
+            return False
+        else:
+            log_sum = 0.0
+            data_check_list = [class_probability for class_probability
+                               in infer_result
+                               if data_check(class_probability)]
+            if len(data_check_list) == len(infer_result):
+                for class_data in data_check_list:
+                    log_sum += class_data * math.log(class_data)
+                confidence_score = 1 + 1.0 * log_sum / math.log(
+                    len(infer_result))
+                return confidence_score >= self.threshold_cross_entropy
+            else:
+                logger.warning("every value of infer_result should be in "
+                               f"[0,1], your data is {infer_result}")
+                return False
diff --git a/lib/neptune/hard_example_mining/object_detection/__init__.py b/lib/neptune/hard_example_mining/object_detection/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/neptune/hard_example_mining/object_detection/scores_filters.py b/lib/neptune/hard_example_mining/object_detection/scores_filters.py
new file mode 100644
index 00000000..3fb13ad5
--- /dev/null
+++ b/lib/neptune/hard_example_mining/object_detection/scores_filters.py
@@ -0,0 +1,56 @@
+import logging
+
+from neptune.hard_example_mining import BaseFilter
+from neptune.hard_example_mining.hard_example_helpers import data_check
+
+logger = logging.getLogger(__name__)
+
+
+class IBTFilter(BaseFilter):
+    """Implement the hard samples discovery methods named IBT
+        (image-box-thresholds).
+
+    :param threshold_img: threshold_img to filter img, whose hard coefficient
+        is less than threshold_img.
+    :param threshold_box: threshold_box to calculate hard coefficient, formula
+        is hard coefficient = number(prediction_boxes less than
+            threshold_box)/number(prediction_boxes)
+    """
+
+    def __init__(self, threshold_img=0.5, threshold_box=0.5):
+        self.threshold_box = threshold_box
+        self.threshold_img = threshold_img
+
+    def hard_judge(self, infer_result=None):
+        """Judge the img is hard sample or not.
+
+        :param infer_result:
+            prediction boxes list,
+                such as [bbox1, bbox2, bbox3,....],
+                where bbox = [xmin, ymin, xmax, ymax, score, label]
+                score should be in [0,1], who will be ignored if its value not
+                in [0,1].
+        :return: `True` means a hard sample, `False` means not a hard sample.
+        """
+        if infer_result is None:
+            logger.warning(f'infer result is invalid, value: {infer_result}!')
+            return False
+        elif len(infer_result) == 0:
+            return False
+        else:
+            data_check_list = [bbox[4] for bbox in infer_result
+                               if data_check(bbox[4])]
+            if len(data_check_list) == len(infer_result):
+                confidence_score_list = [
+                    float(box_score) for box_score in data_check_list
+                    if float(box_score) <= self.threshold_box]
+                if (len(confidence_score_list) / len(infer_result)) \
+                        >= (1 - self.threshold_img):
+                    return True
+                else:
+                    return False
+            else:
+                logger.warning(
+                    "every value of infer_result should be in [0,1], "
+                    f"your data is {infer_result}")
+                return False
diff --git a/lib/neptune/joint_inference/__init__.py b/lib/neptune/joint_inference/__init__.py
new file mode 100644
index 00000000..ef3bad16
--- /dev/null
+++ b/lib/neptune/joint_inference/__init__.py
@@ -0,0 +1 @@
+from .joint_inference import *
diff --git a/lib/neptune/joint_inference/data.py b/lib/neptune/joint_inference/data.py
new file mode 100644
index 00000000..4fcab517
--- /dev/null
+++ b/lib/neptune/joint_inference/data.py
@@ -0,0 +1,20 @@
+import json
+
+
+class ServiceInfo:
+    def __init__(self):
+        self.startTime = ''
+        self.updateTime = ''
+        self.inferenceNumber = 0
+        self.hardExampleNumber = 0
+        self.uploadCloudRatio = 0
+
+    @staticmethod
+    def from_json(json_str):
+        info = ServiceInfo()
+        info.__dict__ = json.loads(json_str)
+        return info
+
+    def to_json(self):
+        info = json.dumps(self.__dict__)
+        return info
diff --git a/lib/neptune/joint_inference/joint_inference.py b/lib/neptune/joint_inference/joint_inference.py
new file mode 100644
index 00000000..fb79f7da
--- /dev/null
+++ b/lib/neptune/joint_inference/joint_inference.py
@@ -0,0 +1,370 @@
+import abc
+import json
+import logging
+import os
+import threading
+import time
+
+import cv2
+import numpy as np
+import requests
+import tensorflow as tf
+from PIL import Image
+from flask import Flask, request
+
+import neptune
+from neptune.common.config import BaseConfig
+from neptune.common.constant import K8sResourceKind
+from neptune.hard_example_mining import CrossEntropyFilter, IBTFilter, \
+    ThresholdFilter
+from neptune.joint_inference.data import ServiceInfo
+from neptune.lc_client import LCClient
+
+LOG = logging.getLogger(__name__)
+
+
+class BigModelConfig(BaseConfig):
+    def __init__(self):
+        BaseConfig.__init__(self)
+        self.bind_ip = os.getenv("BIG_MODEL_BIND_IP", "0.0.0.0")
+        self.bind_port = (
+            int(os.getenv("BIG_MODEL_BIND_PORT", "5000"))
+        )
+
+
+class LittleModelConfig(BaseConfig):
+    def __init__(self):
+        BaseConfig.__init__(self)
+
+
+class BigModelClientConfig:
+    def __init__(self):
+        self.ip = os.getenv("BIG_MODEL_IP")
+        self.port = int(os.getenv("BIG_MODEL_PORT", "5000"))
+
+
+class BaseModel:
+    """Model abstract class.
+
+    :param preprocess: function before inference
+    :param postprocess: function after inference
+    :param input_shape: input shape
+    :param create_input_feed: the function of creating input feed
+    :param create_output_fetch: the function fo creating output fetch
+    """
+
+    def __init__(self, preprocess=None, postprocess=None, input_shape=(0, 0),
+                 create_input_feed=None, create_output_fetch=None):
+        self.preprocess = preprocess
+        self.postprocess = postprocess
+        self.input_shape = input_shape
+        if create_input_feed is None or create_output_fetch is None:
+            raise RuntimeError("Please offer create_input_feed "
+                               "and create_output_fetch function")
+        self.create_input_feed = create_input_feed
+        self.create_output_fetch = create_output_fetch
+
+    @abc.abstractmethod
+    def _load_model(self):
+        pass
+
+    @abc.abstractmethod
+    def inference(self, img_data):
+        pass
+
+
+class BigModelClient:
+    """Remote big model service, which interacts with the cloud big model."""
+    _retry = 5
+    _retry_interval_seconds = 1
+
+    def __init__(self):
+        self.config = BigModelClientConfig()
+        self.big_model_endpoint = "http://{0}:{1}".format(
+            self.config.ip,
+            self.config.port
+        )
+
+    def _load_model(self):
+        pass
+
+    def inference(self, img_data):
+        """Use the remote big model server to inference."""
+        _, encoded_image = cv2.imencode(".jpeg", img_data)
+        files = {"images": encoded_image}
+        error = None
+        for i in range(BigModelClient._retry):
+            try:
+                res = requests.post(self.big_model_endpoint, timeout=5,
+                                    files=files)
+                if res.status_code < 300:
+                    return res.json().get("data")
+                else:
+                    LOG.error(f"send request to {self.big_model_endpoint} "
+                              f"failed, status is {res.status_code}")
+                    return None
+            except requests.exceptions.RequestException as e:
+                error = e
+                time.sleep(BigModelClient._retry_interval_seconds)
+
+        LOG.error(f"send request to {self.big_model_endpoint} failed, "
+                  f"error is {error}, retry times: {BigModelClient._retry}")
+        return None
+
+
+class TSBigModelService(BaseModel):
+    """Large model services implemented based on TensorFlow.
+    Provides RESTful interfaces for large-model inference.
+    """
+
+    def __init__(self, preprocess=None, postprocess=None, input_shape=(0, 0),
+                 create_input_feed=None, create_output_fetch=None):
+        BaseModel.__init__(self, preprocess, postprocess, input_shape,
+                           create_input_feed, create_output_fetch)
+        self.config = BigModelConfig()
+
+        self.input_shape = input_shape
+        self._load_model()
+
+        self.app = Flask(__name__)
+        self.register()
+        self.app.run(host=self.config.bind_ip,
+                     port=self.config.bind_port)
+
+    def register(self):
+        @self.app.route('/', methods=['POST'])
+        def inference():
+            f = request.files.get('images')
+            image = Image.open(f)
+            image = image.convert("RGB")
+            img_data, org_img_shape = self.preprocess(image, self.input_shape)
+            data = self.inference(img_data)
+            result = self.postprocess(data, org_img_shape)
+            # encapsulate the user result
+            data = {"data": result}
+            return json.dumps(data)
+
+    def _load_model(self):
+        self.graph = tf.Graph()
+        self.sess = tf.compat.v1.InteractiveSession(graph=self.graph)
+
+        with tf.io.gfile.GFile(self.config.model_url, 'rb') as f:
+            graph_def = tf.compat.v1.GraphDef()
+            graph_def.ParseFromString(f.read())
+
+        tf.import_graph_def(graph_def, name='')
+        LOG.info(f"Import yolo model from {self.config.model_url} end .......")
+
+    def inference(self, img_data):
+        input_feed = self.create_input_feed(self.sess, img_data)
+        output_fetch = self.create_output_fetch(self.sess)
+
+        return self.sess.run(output_fetch, input_feed)
+
+
+class TSLittleModel(BaseModel):
+    """Little model services implemented based on TensorFlow.
+    Provides RESTful interfaces for large-model inference.
+    """
+
+    def __init__(self, preprocess=None, postprocess=None, input_shape=(0, 0),
+                 create_input_feed=None, create_output_fetch=None):
+        BaseModel.__init__(self, preprocess, postprocess, input_shape,
+                           create_input_feed, create_output_fetch)
+
+        self.config = LittleModelConfig()
+
+        graph = tf.Graph()
+        config = tf.ConfigProto(allow_soft_placement=True)
+        config.gpu_options.allow_growth = True
+        config.gpu_options.per_process_gpu_memory_fraction = 0.1
+        self.session = tf.Session(graph=graph, config=config)
+        self._load_model()
+
+    def _load_model(self):
+        with self.session.as_default():
+            with self.session.graph.as_default():
+                with tf.gfile.FastGFile(self.config.model_url, 'rb') as handle:
+                    LOG.info(f"Load model {self.config.model_url}, "
+                             f"ParseFromString start .......")
+                    graph_def = tf.GraphDef()
+                    graph_def.ParseFromString(handle.read())
+                    LOG.info("ParseFromString end .......")
+
+                    tf.import_graph_def(graph_def, name='')
+                    LOG.info("Import_graph_def end .......")
+
+        LOG.info("Import model from pb end .......")
+
+    def inference(self, img_data):
+        img_data_np = np.array(img_data)
+        with self.session.as_default():
+            new_image = self.preprocess(img_data_np, self.input_shape)
+            input_feed = self.create_input_feed(self.session, new_image,
+                                                img_data_np)
+            output_fetch = self.create_output_fetch(self.session)
+            return self.session.run(output_fetch, input_feed)
+
+
+class LCReporter(threading.Thread):
+    """Inherited thread, which is an entity that periodically report to
+    the lc.
+    """
+
+    def __init__(self):
+        threading.Thread.__init__(self)
+
+        # the value of statistics
+        self.inference_number = 0
+        self.hard_example_number = 0
+        self.period_interval = int(os.getenv("LC_PERIOD", "30"))
+        # The system resets the period_increment after sending the messages to
+        # the LC. If the period_increment is 0 in the current period,
+        # the system does not send the messages to the LC.
+        self.period_increment = 0
+        self.lock = threading.Lock()
+
+    def update_for_edge_inference(self):
+        self.lock.acquire()
+        self.inference_number += 1
+        self.period_increment += 1
+        self.lock.release()
+
+    def update_for_collaboration_inference(self):
+        self.lock.acquire()
+        self.inference_number += 1
+        self.hard_example_number += 1
+        self.period_increment += 1
+        self.lock.release()
+
+    def run(self):
+        while True:
+
+            info = ServiceInfo()
+            info.startTime = time.strftime("%Y-%m-%d %H:%M:%S",
+                                           time.localtime())
+
+            time.sleep(self.period_interval)
+            if self.period_increment == 0:
+                LOG.debug("period increment is zero, skip report")
+                continue
+            info.updateTime = time.strftime("%Y-%m-%d %H:%M:%S",
+                                            time.localtime())
+            info.inferenceNumber = self.inference_number
+            info.hardExampleNumber = self.hard_example_number
+            info.uploadCloudRatio = (
+                    self.hard_example_number / self.inference_number
+            )
+            message = {
+                "name": BaseConfig.worker_name,
+                "namespace": BaseConfig.namespace,
+                "ownerName": BaseConfig.service_name,
+                "ownerKind": K8sResourceKind.JOINT_INFERENCE_SERVICE.value,
+                "kind": "inference",
+                "ownerInfo": info.__dict__,
+                "results": []
+            }
+            LCClient.send(BaseConfig.worker_name, message)
+            self.period_increment = 0
+
+
+class InferenceResult:
+    """The Result class for joint inference
+
+    :param is_hard_sample: `True` means a hard sample, `False` means not a hard
+        sample
+    :param final_result: the final inference result
+    :param hard_sample_edge_result: the edge little model inference result of
+        hard sample
+    :param hard_sample_cloud_result: the cloud big model inference result of
+        hard sample
+    """
+
+    def __init__(self, is_hard_sample, final_result,
+                 hard_sample_edge_result, hard_sample_cloud_result):
+        self.is_hard_sample = is_hard_sample
+        self.final_result = final_result
+        self.hard_sample_edge_result = hard_sample_edge_result
+        self.hard_sample_cloud_result = hard_sample_cloud_result
+
+
+class JointInference:
+    """Class provided for external systems for model joint inference.
+
+    :param little_model: the little model entity for edge inference
+    :param hard_example_mining_algorithm: the algorithm for judging hard sample
+    :param pre_hook: the pre function of edge inference
+    :param post_hook: the post function of edge inference
+    """
+
+    def __init__(self, little_model: BaseModel,
+                 hard_example_mining_algorithm=None,
+                 pre_hook=None, post_hook=None):
+        self.little_model = little_model
+        self.big_model = BigModelClient()
+        # TODO how to deal process use-defined cloud_offload_algorithm,
+        # especially parameters
+        if hard_example_mining_algorithm is None:
+            hem_name = BaseConfig.hem_name
+
+            if hem_name == "IBT":
+                threshold_box = float(neptune.context.get_hem_parameters(
+                    "threshold_box", 0.5
+                ))
+                threshold_img = float(neptune.context.get_hem_parameters(
+                    "threshold_img", 0.5
+                ))
+                hard_example_mining_algorithm = IBTFilter(threshold_img,
+                                                          threshold_box)
+            elif hem_name == "CrossEntropy":
+                threshold_cross_entropy = float(
+                    neptune.context.get_hem_parameters(
+                        "threshold_cross_entropy", 0.5
+                    )
+                )
+                hard_example_mining_algorithm = CrossEntropyFilter(
+                    threshold_cross_entropy)
+            else:
+                hard_example_mining_algorithm = ThresholdFilter()
+
+        self.cloud_offload_algorithm = hard_example_mining_algorithm
+        self.pre_hook = pre_hook
+        self.post_hook = post_hook
+
+        self.lc_reporter = LCReporter()
+        self.lc_reporter.setDaemon(True)
+        self.lc_reporter.start()
+
+    def inference(self, img_data) -> InferenceResult:
+        """Image inference function."""
+        img_data_pre = img_data
+        if self.pre_hook:
+            img_data_pre = self.pre_hook(img_data_pre)
+        edge_result = self.little_model.inference(img_data_pre)
+        if self.post_hook:
+            edge_result = self.post_hook(edge_result)
+        is_hard_sample = self.cloud_offload_algorithm.hard_judge(edge_result)
+        if not is_hard_sample:
+            LOG.debug("not hard sample, use edge result directly")
+            self.lc_reporter.update_for_edge_inference()
+            return InferenceResult(False, edge_result, None, None)
+
+        cloud_result = self._cloud_inference(img_data)
+        if cloud_result is None:
+            LOG.warning("retrieve cloud infer service failed, use edge result")
+            self.lc_reporter.update_for_edge_inference()
+            return InferenceResult(True, edge_result, edge_result, None)
+        else:
+            LOG.debug(f"retrieve cloud infer service success, use cloud "
+                      f"result, cloud result:{cloud_result}")
+            self.lc_reporter.update_for_collaboration_inference()
+            return InferenceResult(True, cloud_result, edge_result,
+                                   cloud_result)
+
+    def _cloud_inference(self, img_rgb):
+        return self.big_model.inference(img_rgb)
+
+
+def _get_or_default(parameter, default):
+    value = neptune.context.get_parameters(parameter)
+    return value if value else default
diff --git a/lib/neptune/lc_client.py b/lib/neptune/lc_client.py
new file mode 100644
index 00000000..2c9ed7a2
--- /dev/null
+++ b/lib/neptune/lc_client.py
@@ -0,0 +1,43 @@
+import logging
+import os
+import time
+
+import requests
+
+LOG = logging.getLogger(__name__)
+
+
+class LCClientConfig:
+    def __init__(self):
+        self.lc_server = os.getenv("LC_SERVER", "http://127.0.0.1:9100")
+
+
+class LCClient:
+    _retry = 3
+    _retry_interval_seconds = 0.5
+    config = LCClientConfig()
+
+    @classmethod
+    def send(cls, worker_name, message: dict):
+
+        url = '{0}/neptune/workers/{1}/info'.format(
+            cls.config.lc_server,
+            worker_name
+        )
+        error = None
+        for i in range(cls._retry):
+            try:
+                res = requests.post(url=url, json=message)
+                LOG.info(
+                    f"send to lc, url={url}, data={message},"
+                    f"state={res.status_code}")
+                return res.status_code < 300
+            except Exception as e:
+                error = e
+                time.sleep(cls._retry_interval_seconds)
+
+        LOG.warning(
+            f"can't connect to lc[{cls.config.lc_server}] "
+            f"data={message}, error={error}, "
+            f"retry times: {cls._retry}")
+        return False
diff --git a/lib/requirements.txt b/lib/requirements.txt
new file mode 100644
index 00000000..26d1cf3b
--- /dev/null
+++ b/lib/requirements.txt
@@ -0,0 +1,6 @@
+flask==1.1.2
+keras==2.4.3
+opencv-python==4.4.0.44
+websockets==8.1
+Pillow==8.0.1
+requests==2.24.0
diff --git a/lib/setup.py b/lib/setup.py
new file mode 100644
index 00000000..cf403a6d
--- /dev/null
+++ b/lib/setup.py
@@ -0,0 +1,19 @@
+from setuptools import setup
+
+setup(
+    name='neptune',
+    version='0.0.1',
+    description="The neptune package is designed to help developers \
+                better use open source frameworks such as tensorflow \
+                on Neptune project",
+    packages=['neptune'],
+    python_requires='>=3.6',
+    install_requires=[
+        'flask>=1.1.2',
+        'keras>=2.4.3',
+        'Pillow>=8.0.1',
+        'opencv-python>=4.4.0.44',
+        'websockets>=8.1'
+        'requests>=2.24.0'
+    ]
+)