diff --git a/server/gameserver/hero.cc b/server/gameserver/hero.cc
index 249be5ea..16916af5 100644
--- a/server/gameserver/hero.cc
+++ b/server/gameserver/hero.cc
@@ -401,3 +401,13 @@ void Hero::DropItems(Obstacle* obstacle)
         room->ScatterDrop(obstacle->GetPos().ToGlmVec3(), drop_id);
     }
 }
+
+void Hero::Active()
+{
+
+}
+
+void Hero::Deactive()
+{
+
+}
diff --git a/server/gameserver/hero.h b/server/gameserver/hero.h
index 28fab48e..213876ab 100644
--- a/server/gameserver/hero.h
+++ b/server/gameserver/hero.h
@@ -41,6 +41,8 @@ public:
     virtual void OnBattleStart(Room* room) override;
     void Destory();
     void BeKill(int killer_id, const std::string& killer_name, int weapon_id);
+    void Active();
+    void Deactive();
 
 protected:
     virtual void UpdateMove() override;
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 225ab7b5..b37bdeb8 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -625,6 +625,9 @@ void Human::OnGridListChange(std::set<GridCell*>& old_grids,
     if (IsPlayer() && on_grid_chg) {
         on_grid_chg(this);
     }
+    if (HasObserver()) {
+
+    }
 }
 
 void Human::SyncAroundPlayers(const char* file, int line, const char* func)