diff --git a/logic/GameClass/GameObj/Bullet/BombedBullet.cs b/logic/GameClass/GameObj/Bullet/BombedBullet.cs
index b4afd1f..492ecb8 100644
--- a/logic/GameClass/GameObj/Bullet/BombedBullet.cs
+++ b/logic/GameClass/GameObj/Bullet/BombedBullet.cs
@@ -3,7 +3,7 @@
 namespace GameClass.GameObj
 {
     // 为方便界面组做子弹爆炸特效，现引入“爆炸中的子弹”，在每帧发送给界面组
-    public sealed class BombedBullet : GameObj
+    public sealed class BombedBullet : Immovable
     {
         public override ShapeType Shape => ShapeType.Circle;
         public override bool IsRigid => false;
@@ -15,7 +15,7 @@ namespace GameClass.GameObj
         {
             this.bulletHasBombed = bullet;
             this.MappingID = bullet.ID;
-            this.FacingDirection = bullet.FacingDirection;
+            this.facingDirection = bullet.FacingDirection;
         }
     }
 }
diff --git a/logic/GameClass/GameObj/Bullet/Bullet.cs b/logic/GameClass/GameObj/Bullet/Bullet.cs
index acada59..ff512bc 100644
--- a/logic/GameClass/GameObj/Bullet/Bullet.cs
+++ b/logic/GameClass/GameObj/Bullet/Bullet.cs
@@ -44,7 +44,7 @@ namespace GameClass.GameObj
         public Bullet(Character player, int radius, XY Position) :
             base(Position, radius, GameObjType.Bullet)
         {
-            this.CanMove = true;
+            this.canMove = true;
             this.moveSpeed = this.Speed;
             this.hasSpear = player.TryUseSpear();
             this.Parent = player;
diff --git a/logic/GameClass/GameObj/Character/Character.Skill.cs b/logic/GameClass/GameObj/Character/Character.Skill.cs
index c835a6d..0ae23db 100644
--- a/logic/GameClass/GameObj/Character/Character.Skill.cs
+++ b/logic/GameClass/GameObj/Character/Character.Skill.cs
@@ -57,7 +57,7 @@ namespace GameClass.GameObj
         protected Character(XY initPos, int initRadius, CharacterType characterType) :
             base(initPos, initRadius, GameObjType.Character)
         {
-            this.CanMove = true;
+            this.canMove = true;
             this.score = 0;
             this.buffManager = new BuffManager();
             this.occupation = OccupationFactory.FindIOccupation(characterType);
diff --git a/logic/GameClass/GameObj/Character/Character.cs b/logic/GameClass/GameObj/Character/Character.cs
index aa799eb..ba00643 100644
--- a/logic/GameClass/GameObj/Character/Character.cs
+++ b/logic/GameClass/GameObj/Character/Character.cs
@@ -2,9 +2,6 @@
 using Preparation.Utility;
 using System;
 using System.Collections.Generic;
-using System.Numerics;
-using System.Runtime.InteropServices;
-using System.Threading;
 
 namespace GameClass.GameObj
 {
@@ -58,10 +55,20 @@ namespace GameClass.GameObj
         /// 进行一次攻击
         /// </summary>
         /// <returns>攻击操作发出的子弹</returns>
-        public Bullet? Attack(XY pos)
+        public Bullet? Attack(double angle)
         {
             if (TrySubBulletNum())
-                return BulletFactory.GetBullet(this, pos);
+            {
+                XY res = Position + new XY  // 子弹紧贴人物生成。
+                    (
+                        (int)(Math.Abs((Radius + BulletFactory.BulletRadius(BulletOfPlayer)) * Math.Cos(angle))) * ((Math.Cos(angle) > 0) ? 1 : -1),
+                        (int)(Math.Abs((Radius + BulletFactory.BulletRadius(BulletOfPlayer)) * Math.Sin(angle))) * ((Math.Sin(angle) > 0) ? 1 : -1)
+                    );
+                Bullet? bullet = BulletFactory.GetBullet(this, res);
+                if (bullet == null) return null;
+                facingDirection = new(angle, bullet.BulletAttackRange);
+                return bullet;
+            }
             else
                 return null;
         }
@@ -362,9 +369,9 @@ namespace GameClass.GameObj
             lock (gameObjLock)
             {
                 playerState = playerStateType;
-                CanMove = false;
+                canMove = false;
                 IsResetting = true;
-                Position = GameData.PosWhoDie;
+                position = GameData.PosWhoDie;
             }
         }
         #endregion
diff --git a/logic/GameClass/GameObj/GameObj.cs b/logic/GameClass/GameObj/GameObj.cs
index 0c9c301..0b7727c 100644
--- a/logic/GameClass/GameObj/GameObj.cs
+++ b/logic/GameClass/GameObj/GameObj.cs
@@ -24,18 +24,18 @@ namespace GameClass.GameObj
         public long ID { get; }
 
         protected XY position;
-        public virtual XY Position { get; set; }
+        public abstract XY Position { get; }
 
         protected XY facingDirection = new(1, 0);
-        public virtual XY FacingDirection { get; set; }
+        public abstract XY FacingDirection { get; }
+
+        protected bool canMove;
+        public abstract bool CanMove { get; }
 
         public abstract bool IsRigid { get; }
 
         public abstract ShapeType Shape { get; }
 
-        protected bool canMove;
-        public virtual bool CanMove { get; set; }
-
         public int Radius { get; }
 
         public virtual bool IgnoreCollideExecutor(IGameObj targetObj) => false;
diff --git a/logic/GameClass/GameObj/Immovable.cs b/logic/GameClass/GameObj/Immovable.cs
new file mode 100644
index 0000000..6662d98
--- /dev/null
+++ b/logic/GameClass/GameObj/Immovable.cs
@@ -0,0 +1,19 @@
+using Preparation.Interface;
+using Preparation.Utility;
+
+namespace GameClass.GameObj
+{
+    public abstract class Immovable : GameObj
+    {
+
+        public override XY Position => position;
+
+        public override XY FacingDirection => facingDirection;
+
+        public override bool CanMove => false;
+
+        public Immovable(XY initPos, int initRadius, GameObjType initType) : base(initPos, initRadius, initType)
+        {
+        }
+    }
+}
diff --git a/logic/GameClass/GameObj/Map/Chest.cs b/logic/GameClass/GameObj/Map/Chest.cs
index 1cc8707..69a1ed9 100644
--- a/logic/GameClass/GameObj/Map/Chest.cs
+++ b/logic/GameClass/GameObj/Map/Chest.cs
@@ -5,12 +5,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 箱子
     /// </summary>
-    public class Chest : Tile
+    public class Chest : Immovable
     {
         public Chest(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Chest)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Map/Door.cs b/logic/GameClass/GameObj/Map/Door.cs
index c6e392a..2410421 100644
--- a/logic/GameClass/GameObj/Map/Door.cs
+++ b/logic/GameClass/GameObj/Map/Door.cs
@@ -6,7 +6,7 @@ namespace GameClass.GameObj
     /// <summary>
     /// 门
     /// </summary>
-    public class Door : Tile
+    public class Door : Immovable
     {
         public Door(XY initPos, PlaceType placeType) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Door)
@@ -24,7 +24,6 @@ namespace GameClass.GameObj
                     doorNum = 6;
                     break;
             }
-            this.CanMove = false;
         }
 
         private readonly int doorNum;
diff --git a/logic/GameClass/GameObj/Map/Doorway.cs b/logic/GameClass/GameObj/Map/Doorway.cs
index 7be71ac..71b2017 100644
--- a/logic/GameClass/GameObj/Map/Doorway.cs
+++ b/logic/GameClass/GameObj/Map/Doorway.cs
@@ -6,12 +6,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 出口
     /// </summary>
-    public class Doorway : Tile
+    public class Doorway : Immovable
     {
         public Doorway(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Doorway)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Map/EmergencyExit.cs b/logic/GameClass/GameObj/Map/EmergencyExit.cs
index 25144b8..5e51daf 100644
--- a/logic/GameClass/GameObj/Map/EmergencyExit.cs
+++ b/logic/GameClass/GameObj/Map/EmergencyExit.cs
@@ -6,12 +6,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 紧急出口
     /// </summary>
-    public class EmergencyExit : Tile
+    public class EmergencyExit : Immovable
     {
         public EmergencyExit(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.EmergencyExit)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Map/Generator.cs b/logic/GameClass/GameObj/Map/Generator.cs
index 1252b74..204c0f3 100644
--- a/logic/GameClass/GameObj/Map/Generator.cs
+++ b/logic/GameClass/GameObj/Map/Generator.cs
@@ -5,12 +5,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 发电机
     /// </summary>
-    public class Generator : Tile
+    public class Generator : Immovable
     {
         public Generator(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Generator)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Map/Wall.cs b/logic/GameClass/GameObj/Map/Wall.cs
index 7d06537..8001b8d 100644
--- a/logic/GameClass/GameObj/Map/Wall.cs
+++ b/logic/GameClass/GameObj/Map/Wall.cs
@@ -5,12 +5,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 墙体
     /// </summary>
-    public class Wall : Tile
+    public class Wall : Immovable
     {
         public Wall(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Wall)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Map/Window.cs b/logic/GameClass/GameObj/Map/Window.cs
index 00585a1..864e58f 100644
--- a/logic/GameClass/GameObj/Map/Window.cs
+++ b/logic/GameClass/GameObj/Map/Window.cs
@@ -6,12 +6,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 窗
     /// </summary>
-    public class Window : Tile
+    public class Window : Immovable
     {
         public Window(XY initPos) :
             base(initPos, GameData.numOfPosGridPerCell / 2, GameObjType.Window)
         {
-            this.CanMove = false;
         }
         public override bool IsRigid => true;
         public override ShapeType Shape => ShapeType.Square;
diff --git a/logic/GameClass/GameObj/Moveable.cs b/logic/GameClass/GameObj/Moveable.cs
index 3a48ef3..b134e67 100644
--- a/logic/GameClass/GameObj/Moveable.cs
+++ b/logic/GameClass/GameObj/Moveable.cs
@@ -73,12 +73,13 @@ namespace GameClass.GameObj
                 lock (moveReaderWriterLock)
                     return canMove;
             }
-            set
+        }
+
+        public void ReSetCanMove(bool value)
+        {
+            lock (moveReaderWriterLock)
             {
-                lock (moveReaderWriterLock)
-                {
-                    canMove = value;
-                }
+                canMove = value;
             }
         }
 
diff --git a/logic/GameClass/GameObj/OutOfBoundBlock.cs b/logic/GameClass/GameObj/OutOfBoundBlock.cs
index 3cd88eb..8f0c45d 100644
--- a/logic/GameClass/GameObj/OutOfBoundBlock.cs
+++ b/logic/GameClass/GameObj/OutOfBoundBlock.cs
@@ -6,12 +6,11 @@ namespace GameClass.GameObj
     /// <summary>
     /// 逻辑墙
     /// </summary>
-    public class OutOfBoundBlock : GameObj, IOutOfBound
+    public class OutOfBoundBlock : Immovable, IOutOfBound
     {
         public OutOfBoundBlock(XY initPos) :
             base(initPos, int.MaxValue, GameObjType.OutOfBoundBlock)
         {
-            this.CanMove = false;
         }
 
         public override bool IsRigid => true;
diff --git a/logic/GameClass/GameObj/PickedProp.cs b/logic/GameClass/GameObj/PickedProp.cs
index fc070db..c924c82 100644
--- a/logic/GameClass/GameObj/PickedProp.cs
+++ b/logic/GameClass/GameObj/PickedProp.cs
@@ -3,7 +3,7 @@ using System;
 namespace GameClass.GameObj
 {
     // 为方便界面组做道具拾起特效，现引入“被捡起的道具”，在每帧发送给界面组
-    public class PickedProp : GameObj
+    public class PickedProp : Immovable
     {
         public override ShapeType Shape => ShapeType.Circle;
         public override bool IsRigid => false;
diff --git a/logic/GameClass/GameObj/Prop.cs b/logic/GameClass/GameObj/Prop.cs
index c3626de..93848e8 100644
--- a/logic/GameClass/GameObj/Prop.cs
+++ b/logic/GameClass/GameObj/Prop.cs
@@ -22,7 +22,7 @@ namespace GameClass.GameObj
         public Prop(XY initPos, int radius = GameData.PropRadius) :
             base(initPos, radius, GameObjType.Prop)
         {
-            this.CanMove = false;
+            this.canMove = false;
             this.moveSpeed = GameData.PropMoveSpeed;
         }
     }
diff --git a/logic/GameClass/GameObj/Tile.cs b/logic/GameClass/GameObj/Tile.cs
deleted file mode 100644
index ce71673..0000000
--- a/logic/GameClass/GameObj/Tile.cs
+++ /dev/null
@@ -1,22 +0,0 @@
-using Preparation.Interface;
-using Preparation.Utility;
-
-namespace GameClass.GameObj
-{
-    /// <summary>
-    /// 一切游戏元素的总基类，与THUAI4不同，继承IMoveable接口（出于一切物体其实都是可运动的指导思想）——LHR
-    /// </summary>
-    public abstract class Tile : GameObj
-    {
-
-        public override XY Position => position;
-
-        public override XY FacingDirection => facingDirection;
-
-        public override bool CanMove => false;
-
-        public Tile(XY initPos, int initRadius, GameObjType initType) : base(initPos, initRadius, initType)
-        {
-        }
-    }
-}
diff --git a/logic/Gaming/ActionManager.cs b/logic/Gaming/ActionManager.cs
index 2e142e1..5fe275c 100644
--- a/logic/Gaming/ActionManager.cs
+++ b/logic/Gaming/ActionManager.cs
@@ -267,7 +267,7 @@ namespace Gaming
                       {
                           Prop prop = chestToOpen.PropInChest[i];
                           chestToOpen.PropInChest[i] = new NullProp();
-                          prop.Position = player.Position;
+                          prop.ReSetPos(player.Position);
                           gameMap.Add(prop);
                       }
                   }
@@ -323,7 +323,7 @@ namespace Gaming
                       return;
                   }
 
-                  player.Position = windowToPlayer + windowForClimb.Position;
+                  player.ReSetPos(windowToPlayer + windowForClimb.Position);
                   player.MoveSpeed = player.SpeedOfClimbingThroughWindows;
 
                   moveEngine.MoveObj(player, (int)(windowToPlayer.Length() * 3.0 * 1000 / player.MoveSpeed), (-1 * windowToPlayer).Angle());
@@ -339,7 +339,7 @@ namespace Gaming
                     )
                     .Start();
                   XY PosJumpOff = windowForClimb.Position - 2 * windowToPlayer;
-                  player.Position = PosJumpOff;
+                  player.ReSetPos(PosJumpOff);
                   player.MoveSpeed = player.ReCalculateBuff(BuffType.AddSpeed, player.OrgMoveSpeed, GameData.MaxSpeed, GameData.MinSpeed);
                   windowForClimb.WhoIsClimbing = null;
                   //  gameMap.Remove(addWall);
diff --git a/logic/Gaming/AttackManager.cs b/logic/Gaming/AttackManager.cs
index 69203b1..f35960a 100644
--- a/logic/Gaming/AttackManager.cs
+++ b/logic/Gaming/AttackManager.cs
@@ -33,7 +33,7 @@ namespace Gaming
                         Debugger.Output(obj, " end move at " + obj.Position.ToString() + " At time: " + Environment.TickCount64);
                         if (obj.CanMove && ((Bullet)obj).TypeOfBullet != BulletType.JumpyDumpty)
                             BulletBomb((Bullet)obj, null);
-                        obj.CanMove = false;
+                        obj.ReSetCanMove(false);
                     }
                 );
                 this.characterManager = characterManager;
@@ -66,7 +66,7 @@ namespace Gaming
 
             public bool TryRemoveBullet(Bullet bullet)
             {
-                bullet.CanMove = false;
+                bullet.ReSetCanMove(false);
                 if (gameMap.Remove(bullet))
                 {
                     if (bullet.BulletBombRange > 0)
@@ -172,20 +172,14 @@ namespace Gaming
                 Debugger.Output(player, player.CharacterType.ToString() + "Attack in " + player.BulletOfPlayer.ToString());
 
                 Debugger.Output(player, player.Position.ToString() + " " + player.Radius.ToString() + " " + BulletFactory.BulletRadius(player.BulletOfPlayer).ToString());
-                XY res = player.Position + new XY  // 子弹紧贴人物生成。
-                    (
-                        (int)(Math.Abs((player.Radius + BulletFactory.BulletRadius(player.BulletOfPlayer)) * Math.Cos(angle))) * ((Math.Cos(angle) > 0) ? 1 : -1),
-                        (int)(Math.Abs((player.Radius + BulletFactory.BulletRadius(player.BulletOfPlayer)) * Math.Sin(angle))) * ((Math.Sin(angle) > 0) ? 1 : -1)
-                    );
 
-                Bullet? bullet = player.Attack(res);
+                Bullet? bullet = player.Attack(angle);
 
                 if (bullet != null)
                 {
-                    player.FacingDirection = new(angle, bullet.BulletAttackRange);
                     Debugger.Output(bullet, "Attack in " + bullet.Position.ToString());
                     bullet.AP += player.TryAddAp() ? GameData.ApPropAdd : 0;
-                    bullet.CanMove = true;
+                    bullet.ReSetCanMove(true);
                     gameMap.Add(bullet);
                     moveEngine.MoveObj(bullet, (int)((bullet.BulletAttackRange - player.Radius - BulletFactory.BulletRadius(player.BulletOfPlayer)) * 1000 / bullet.MoveSpeed), angle);  // 这里时间参数除出来的单位要是ms
                     if (bullet.CastTime > 0)
diff --git a/logic/Gaming/CharacterManager .cs b/logic/Gaming/CharacterManager .cs
index 92593a4..31a5b18 100644
--- a/logic/Gaming/CharacterManager .cs	
+++ b/logic/Gaming/CharacterManager .cs	
@@ -407,7 +407,7 @@ namespace Gaming
                     Prop? prop = player.UseProp(i);
                     if (prop != null)
                     {
-                        prop.Position = player.Position;
+                        prop.ReSetPos(player.Position);
                         gameMap.Add(prop);
                     }
                 }
diff --git a/logic/Gaming/Game.cs b/logic/Gaming/Game.cs
index 8378eba..8a0dd98 100644
--- a/logic/Gaming/Game.cs
+++ b/logic/Gaming/Game.cs
@@ -316,7 +316,7 @@ namespace Gaming
                         {
                             foreach (Character player in gameMap.GameObjDict[GameObjType.Character])
                             {
-                                player.CanMove = false;
+                                player.ReSetCanMove(false);
                             }
                         }
                         gameMap.GameObjDict[keyValuePair.Key].Clear();
diff --git a/logic/Gaming/PropManager.cs b/logic/Gaming/PropManager.cs
index 57b18c9..9bf9714 100644
--- a/logic/Gaming/PropManager.cs
+++ b/logic/Gaming/PropManager.cs
@@ -124,7 +124,7 @@ namespace Gaming
                 if (prop.GetPropType() == PropType.Null)
                     return;
 
-                prop.Position = player.Position;
+                prop.ReSetPos(player.Position);
                 gameMap.Add(prop);
             }
 
diff --git a/logic/Preparation/Interface/IGameObj.cs b/logic/Preparation/Interface/IGameObj.cs
index 949e5e3..017226f 100644
--- a/logic/Preparation/Interface/IGameObj.cs
+++ b/logic/Preparation/Interface/IGameObj.cs
@@ -10,7 +10,7 @@ namespace Preparation.Interface
         public XY FacingDirection { get; }
         public bool IsRigid { get; }
         public ShapeType Shape { get; }
-        public bool CanMove { get; set; }
+        public bool CanMove { get; }
         public int Radius { get; }  // if Square, Radius equals half length of one side
         public bool IgnoreCollideExecutor(IGameObj targetObj);             // 忽略碰撞，在具体类中实现
     }
diff --git a/logic/Preparation/Interface/IMoveable.cs b/logic/Preparation/Interface/IMoveable.cs
index bc8e8f9..7abe556 100644
--- a/logic/Preparation/Interface/IMoveable.cs
+++ b/logic/Preparation/Interface/IMoveable.cs
@@ -11,6 +11,7 @@ namespace Preparation.Interface
         public bool IsResetting { get; set; }  // reviving
         public bool IsAvailable { get; }
         public long MovingSetPos(XY moveVec);
+        public void ReSetCanMove(bool value);
         public bool WillCollideWith(IGameObj? targetObj, XY nextPos)  // 检查下一位置是否会和目标物碰撞
         {
             if (targetObj == null)
diff --git a/logic/Server/CopyInfo.cs b/logic/Server/CopyInfo.cs
index ff88b8b..9b4ff84 100644
--- a/logic/Server/CopyInfo.cs
+++ b/logic/Server/CopyInfo.cs
@@ -268,7 +268,6 @@ namespace Server
                     Y = chest.Position.y
                 }
             };
-            Debugger.Output(chest, chest.OpenStartTime.ToString());
             int progress = (chest.WhoOpen != null) ? ((time - chest.OpenStartTime) * chest.WhoOpen.SpeedOfOpenChest) : 0;
             msg.ChestMessage.Progress = (progress > GameData.degreeOfOpenedChest) ? GameData.degreeOfOpenedChest : progress;
             return msg;