diff --git a/docs/source/fastNLP.models.char_language_model.rst b/docs/source/fastNLP.models.char_language_model.rst
deleted file mode 100644
index 8cfc9e6e..00000000
--- a/docs/source/fastNLP.models.char_language_model.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-fastNLP.models.char\_language\_model module
-===========================================
-
-.. automodule:: fastNLP.models.char_language_model
-    :members:
-    :undoc-members:
-    :show-inheritance:
diff --git a/docs/source/fastNLP.models.rst b/docs/source/fastNLP.models.rst
index ae4abf7a..24fca203 100644
--- a/docs/source/fastNLP.models.rst
+++ b/docs/source/fastNLP.models.rst
@@ -14,7 +14,6 @@ Submodules
    fastNLP.models.base_model
    fastNLP.models.bert
    fastNLP.models.biaffine_parser
-   fastNLP.models.char_language_model
    fastNLP.models.cnn_text_classification
    fastNLP.models.enas_controller
    fastNLP.models.enas_model
diff --git a/docs/source/fastNLP.modules.dropout.rst b/docs/source/fastNLP.modules.dropout.rst
deleted file mode 100644
index f525e08f..00000000
--- a/docs/source/fastNLP.modules.dropout.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-fastNLP.modules.dropout module
-==============================
-
-.. automodule:: fastNLP.modules.dropout
-    :members:
-    :undoc-members:
-    :show-inheritance:
diff --git a/docs/source/fastNLP.modules.encoder.linear.rst b/docs/source/fastNLP.modules.encoder.linear.rst
deleted file mode 100644
index 7a479ca2..00000000
--- a/docs/source/fastNLP.modules.encoder.linear.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-fastNLP.modules.encoder.linear module
-=====================================
-
-.. automodule:: fastNLP.modules.encoder.linear
-    :members:
-    :undoc-members:
-    :show-inheritance:
diff --git a/docs/source/fastNLP.modules.encoder.rst b/docs/source/fastNLP.modules.encoder.rst
index 3ee246c2..e571331d 100644
--- a/docs/source/fastNLP.modules.encoder.rst
+++ b/docs/source/fastNLP.modules.encoder.rst
@@ -15,7 +15,6 @@ Submodules
    fastNLP.modules.encoder.char_encoder
    fastNLP.modules.encoder.conv_maxpool
    fastNLP.modules.encoder.embedding
-   fastNLP.modules.encoder.linear
    fastNLP.modules.encoder.lstm
    fastNLP.modules.encoder.star_transformer
    fastNLP.modules.encoder.transformer
diff --git a/docs/source/fastNLP.modules.other_modules.rst b/docs/source/fastNLP.modules.other_modules.rst
deleted file mode 100644
index c1bba5fb..00000000
--- a/docs/source/fastNLP.modules.other_modules.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-fastNLP.modules.other\_modules module
-=====================================
-
-.. automodule:: fastNLP.modules.other_modules
-    :members:
-    :undoc-members:
-    :show-inheritance:
diff --git a/docs/source/fastNLP.modules.utils.rst b/docs/source/fastNLP.modules.utils.rst
deleted file mode 100644
index b7eb672e..00000000
--- a/docs/source/fastNLP.modules.utils.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-fastNLP.modules.utils module
-============================
-
-.. automodule:: fastNLP.modules.utils
-    :members:
-    :undoc-members:
-    :show-inheritance:
diff --git a/fastNLP/core/callback.py b/fastNLP/core/callback.py
index a6cc3402..0a2d052f 100644
--- a/fastNLP/core/callback.py
+++ b/fastNLP/core/callback.py
@@ -293,7 +293,8 @@ class CallbackManager(Callback):
 
 
 class GradientClipCallback(Callback):
-    """每次backward前，将parameter的gradient clip到某个范围。
+    """
+    每次backward前，将parameter的gradient clip到某个范围。
 
     :param None,torch.Tensor,List[torch.Tensor] parameters: 一般通过model.parameters()获得。如果为None则默认对Trainer
         的model中所有参数进行clip
@@ -304,6 +305,7 @@ class GradientClipCallback(Callback):
         
             2 'value', 将gradient限制在[-clip_value, clip_value], 小于-clip_value的gradient被赋值为-clip_value;
             大于clip_value的gradient被赋值为clip_value.
+
     """
     
     def __init__(self, parameters=None, clip_value=1, clip_type='norm'):