diff --git a/server/gameserver/framedata.cc b/server/gameserver/framedata.cc
index 35af3d0..384d3df 100644
--- a/server/gameserver/framedata.cc
+++ b/server/gameserver/framedata.cc
@@ -9,6 +9,11 @@ void FrameData::ClearFrameData(Human* hum)
     if (!new_objects.empty()) {
         new_objects.clear();
     }
+    if (!block_objects.empty()) {
+        if (hum->IsAndroid() && !hum->HasObserver()) {
+            block_objects.clear();
+        }
+    }
     if (!del_objects.empty()) {
         if (!a8::HasBitFlag(hum->status, CS_Disable)) {
             for (auto& itr : del_objects) {
diff --git a/server/gameserver/framemaker.cc b/server/gameserver/framemaker.cc
index 31437ee..004681c 100644
--- a/server/gameserver/framemaker.cc
+++ b/server/gameserver/framemaker.cc
@@ -174,6 +174,13 @@ void FrameMaker::SerializeLootObjects(cs::SMUpdate* msg, Room* room, Human* hum,
 void FrameMaker::SerializeMapBlockObjects(cs::SMUpdate* msg, Room* room, Human* hum, FrameData* framedata)
 {
 
+    for (auto itr = framedata->block_objects.begin(); itr != framedata->block_objects.end(); ) {
+        if (framedata->new_objects.size() >= 200) {
+            break;
+        }
+        framedata->new_objects[itr->first] = itr->second;
+        itr = framedata->block_objects.erase(itr);
+    }
 }
 
 void FrameMaker::SerializeNewObjects(cs::SMUpdate* msg, Room* room, Human* hum, FrameData* framedata)
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index e0f5cca..637810f 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -817,7 +817,11 @@ void Human::DecHP(float dec_hp, int killer_id, const std::string& killer_name, i
 
 void Human::AddToNewObjects(Entity* entity)
 {
-    framedata_.new_objects[entity->GetUniId()] = entity->GetEntityWeakPtrRef();
+    if (entity->IsEntityType(ET_MapBlock) && MetaMgr::Instance()->async_send_mapblock) {
+        framedata_.block_objects[entity->GetUniId()] = entity->GetEntityWeakPtrRef();
+    } else {
+        framedata_.new_objects[entity->GetUniId()] = entity->GetEntityWeakPtrRef();
+    }
 }
 
 void Human::AddToPartObjects(Entity* entity)
@@ -899,7 +903,11 @@ void Human::RemoveObjects(Entity* entity)
 
 void Human::AddOutObjects(Entity* entity)
 {
-    framedata_.out_objects.insert(entity->GetUniId());
+    if (entity->IsEntityType(ET_MapBlock) && MetaMgr::Instance()->async_send_mapblock) {
+
+    } else {
+        framedata_.out_objects.insert(entity->GetUniId());
+    }
 }
 
 void Human::RemoveOutObjects(Entity* entity)
@@ -1300,7 +1308,7 @@ void Human::RemoveObserver(Human* observer)
 
 bool Human::HasObserver()
 {
-    return !observers_.empty();
+    return observers_.size() > 1;
 }
 
 void Human::SendUpdateMsg()
diff --git a/server/gameserver/metamgr.cc b/server/gameserver/metamgr.cc
index 2e920e3..37cbdad 100644
--- a/server/gameserver/metamgr.cc
+++ b/server/gameserver/metamgr.cc
@@ -329,7 +329,14 @@ public:
             MetaMgr::Instance()->newbie_fill_interval = MetaMgr::Instance()->GetSysParamAsInt("newbie_fill_interval", 5000);
             MetaMgr::Instance()->other_fill_interval = MetaMgr::Instance()->GetSysParamAsInt("other_fill_interval", 2000);
             MetaMgr::Instance()->map_cell_width = MetaMgr::Instance()->GetSysParamAsInt("map_cell_width", 64 * 8);
+            #ifdef DEBUG
+            MetaMgr::Instance()->map_cell_width = 512;
+            #endif
             MetaMgr::Instance()->bullet_planck_step_length = std::max(15, MetaMgr::Instance()->GetSysParamAsInt("bullet_planck_step_length", 15));
+            MetaMgr::Instance()->async_send_mapblock = MetaMgr::Instance()->GetSysParamAsInt("async_send_mapblock", 0);
+#ifdef DEBUG
+            MetaMgr::Instance()->async_send_mapblock = 1;
+#endif
             {
                 METAMGR_READ(prebattle_box_id_chiji, 0);
             }
diff --git a/server/gameserver/metamgr.h b/server/gameserver/metamgr.h
index ec7184e..afa68e8 100644
--- a/server/gameserver/metamgr.h
+++ b/server/gameserver/metamgr.h
@@ -174,6 +174,8 @@ class MetaMgr : public a8::Singleton<MetaMgr>
     int watchable = 0;
     int prebattle_combine_team = 1;
 
+    int async_send_mapblock = 1;
+
  private:
     MetaDataLoader* loader_ = nullptr;