diff --git a/server/gameserver/hero.ai.cc b/server/gameserver/hero.ai.cc
index 892ea545..8cf67dd3 100644
--- a/server/gameserver/hero.ai.cc
+++ b/server/gameserver/hero.ai.cc
@@ -282,10 +282,21 @@ void HeroAI::DoMoveAI()
                 }
                 return false;
             };
-        if (owner->room->IsPveRoom()) {
-        }
         int speed = std::max(1, (int)hero->GetSpeed()) * 1;
+        a8::Vec2 old_pos = hero->GetPos();
         hero->_UpdateMove(speed);
+        if (owner->room->IsPveRoom() && IsNearGas()) {
+#if 1
+            hero->SetPos(old_pos);
+            hero->on_move_collision();
+#else
+            //if (hero->room->GetFrameNo() - node_->last_adjust_dir_frameno > SERVER_FRAME_RATE * 3) {
+                a8::Vec2 dir = hero->GetPos() - hero->room->GetGasData().pos_new;
+                hero->SetMoveDir(dir);
+                node_->last_adjust_dir_frameno = hero->room->GetFrameNo();
+                //}
+#endif
+        }
         hero->on_move_collision = old_on_move_collision_func;
     }
 }
@@ -613,3 +624,10 @@ void HeroAI::ForceRandomWalk(int time, int idle_time)
     node_->next_random_move_frameno = myself->room->GetFrameNo() +
         idle_time / FRAME_RATE_MS;
 }
+
+bool HeroAI::IsNearGas()
+{
+    Hero* hero = (Hero*)owner;
+    float distance = hero->GetPos().Distance(hero->room->GetGasData().pos_new);
+    return distance + hero->GetRadius() * 2 + 20 > hero->room->GetGasData().rad_new;
+}
diff --git a/server/gameserver/hero.ai.h b/server/gameserver/hero.ai.h
index c001bca0..bddc4af5 100644
--- a/server/gameserver/hero.ai.h
+++ b/server/gameserver/hero.ai.h
@@ -36,6 +36,8 @@ public:
     a8::Vec2 target_pos;
     RoomObstacleWeakPtr target_obstacle;
     long long last_collision_times = 0;
+
+    long long last_adjust_dir_frameno = 0;
 };
 
 class HeroAI : public AIComponent
@@ -66,6 +68,7 @@ protected:
     float GetAttackRange();
     float GetShotRange();
     int GetAttackTimes();
+    bool IsNearGas();
 
 protected:
     HeroAINode* node_ = nullptr;