diff --git a/server/gameserver/building.cc b/server/gameserver/building.cc
index f62e118..797d02c 100644
--- a/server/gameserver/building.cc
+++ b/server/gameserver/building.cc
@@ -57,7 +57,25 @@ void Building::FillMFObjectPart(Room* room, Human* hum, cs::MFObjectPart* part_d
 void Building::FillMFObjectFull(Room* room, Human* hum, cs::MFObjectFull* full_data)
 {
     full_data->set_object_type(ET_Building);
+    if (IsClientCached(hum)) {
+        int object_flags = 0;
+        a8::SetBitFlag(object_flags, kOfReadCache);
+        full_data->set_obj_uniid(GetEntityUniId());
+        full_data->set_object_flags(object_flags);
+        return;
+    }
+
     cs::MFBuildingFull* p = full_data->mutable_union_obj_3();
+    if (CanClientCache(hum)) {
+        int object_flags = 0;
+        a8::SetBitFlag(object_flags, kOfWriteCache);
+        #if 0
+        full_data->set_obj_uniid(GetEntityUniId());
+        #endif
+        full_data->set_object_flags(object_flags);
+        AddClientCache(hum);
+    }
+
     p->set_obj_uniid(GetEntityUniId());
     TypeConvert::ToPb(GetPos(), p->mutable_pos());
 
diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index a335c8f..49a267f 100755
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -264,6 +264,17 @@ enum SkinSlot_e
     kSkinSlot_HAT = 2,
 };
 
+enum ObjectFlags_e
+{
+    kOfWriteCache = 0,
+    kOfReadCache = 1,
+};
+
+enum ObjectSyncFlags_e
+{
+    kOsfIsDead = 0,
+};
+
 const char* const PROJ_NAME_FMT = "game%d_gameserver";
 const char* const PROJ_ROOT_FMT = "/data/logs/%s";
 
diff --git a/server/gameserver/entity.cc b/server/gameserver/entity.cc
index ba9ab55..de785f4 100644
--- a/server/gameserver/entity.cc
+++ b/server/gameserver/entity.cc
@@ -123,3 +123,46 @@ void Entity::AddEntityCollider(ColliderComponent* collider)
 {
     colliders_.push_back(collider);
 }
+
+bool Entity::IsClientCached(Human* hum)
+{
+    ObjectSyncFlags* sync_flags = hum->GetObjectSyncFlags(GetEntityUniId());
+    if (sync_flags) {
+        int flags = sync_flags->flags;
+        if (IsDead(hum->room)) {
+            if (a8::HasBitFlag(flags, kOsfIsDead)) {
+                return sync_flags->last_sync_frameno > 0;
+            } else {
+                return false;
+            }
+        } else {
+           if (!a8::HasBitFlag(flags, kOsfIsDead)) {
+                return sync_flags->last_sync_frameno > 0;
+            } else {
+                return false;
+            }
+         }
+    }
+    return false;
+}
+
+bool Entity::CanClientCache(Human* hum)
+{
+    ObjectSyncFlags* sync_flags = hum->GetObjectSyncFlags(GetEntityUniId());
+    return sync_flags != nullptr;
+}
+
+void Entity::AddClientCache(Human* hum)
+{
+    ObjectSyncFlags* sync_flags = hum->GetObjectSyncFlags(GetEntityUniId());
+    if (sync_flags) {
+        int flags = sync_flags->flags;
+        if (IsDead(hum->room)) {
+            a8::SetBitFlag(flags, kOsfIsDead);
+        } else {
+            a8::UnSetBitFlag(flags, kOsfIsDead);
+        }
+        sync_flags->flags = flags;
+        sync_flags->last_sync_frameno = hum->room->GetFrameNo();
+    }
+}
diff --git a/server/gameserver/entity.h b/server/gameserver/entity.h
index be7cf67..d34cb8a 100644
--- a/server/gameserver/entity.h
+++ b/server/gameserver/entity.h
@@ -46,6 +46,11 @@ class Entity
     void SetX(float x) { pos_.x = x; }
     void SetY(float y) { pos_.y = y; }
 
+protected:
+    bool IsClientCached(Human* hum);
+    bool CanClientCache(Human* hum);
+    void AddClientCache(Human* hum);
+
 private:
     void ClearColliders();
     void SetGridId(int grid_id) { grid_id_ = grid_id; }
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index a7da07e..21c8bc7 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -3312,3 +3312,12 @@ void Human::RemoveFromScene()
          });
     last_collision_door_ = nullptr;
 }
+
+ObjectSyncFlags* Human::GetObjectSyncFlags(int obj_uniid)
+{
+    if ((size_t)obj_uniid < fixed_object_sync_flags_.size()) {
+        return &fixed_object_sync_flags_[obj_uniid];
+    } else {
+        return nullptr;
+    }
+}
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index 8f43c02..09dfb5f 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -267,6 +267,7 @@ class Human : public MoveableEntity
     void OnDisable();
     Entity* GetLastCollisionDoor() { return last_collision_door_; }
     void SetLastCollisionDoor(Entity* door) { last_collision_door_ = door; }
+    ObjectSyncFlags* GetObjectSyncFlags(int obj_uniid);
 
 protected:
     void _UpdateMove(int speed);
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index f79e0ac..8e8b56a 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -111,8 +111,24 @@ void Obstacle::FillMFObjectPart(Room* room, Human* hum, cs::MFObjectPart* part_d
 void Obstacle::FillMFObjectFull(Room* room, Human* hum, cs::MFObjectFull* full_data)
 {
     full_data->set_object_type(ET_Obstacle);
+    if (IsClientCached(hum)) {
+        int object_flags = 0;
+        a8::SetBitFlag(object_flags, kOfReadCache);
+        full_data->set_obj_uniid(GetEntityUniId());
+        full_data->set_object_flags(object_flags);
+        return;
+    }
 
     cs::MFObstacleFull* p = full_data->mutable_union_obj_2();
+    if (CanClientCache(hum)) {
+        int object_flags = 0;
+        a8::SetBitFlag(object_flags, kOfWriteCache);
+        #if 0
+        full_data->set_obj_uniid(GetEntityUniId());
+        #endif
+        full_data->set_object_flags(object_flags);
+        AddClientCache(hum);
+    }
     p->set_obj_uniid(GetEntityUniId());
     TypeConvert::ToPb(GetPos(), p->mutable_pos());
     p->set_scale(1.0f);