diff --git a/dizoo/gym_hybrid/envs/gym-hybrid/gym_hybrid/environments.py b/dizoo/gym_hybrid/envs/gym-hybrid/gym_hybrid/environments.py
index bbbb15c994..9716bc4484 100644
--- a/dizoo/gym_hybrid/envs/gym-hybrid/gym_hybrid/environments.py
+++ b/dizoo/gym_hybrid/envs/gym-hybrid/gym_hybrid/environments.py
@@ -171,7 +171,7 @@ def distance(self) -> float:
 
     @staticmethod
     def get_distance(x1: float, y1: float, x2: float, y2: float) -> float:
-        return np.sqrt(((x1 - x2) ** 2) + ((y1 - y2) ** 2))
+        return np.sqrt(((x1 - x2) ** 2) + ((y1 - y2) ** 2)).item()
 
     def render(self, mode='human'):
         screen_width = 400
@@ -397,7 +397,7 @@ def distance(self) -> float:
 
     @staticmethod
     def get_distance(x1: float, y1: float, x2: float, y2: float) -> float:
-        return np.sqrt(((x1 - x2) ** 2) + ((y1 - y2) ** 2))
+        return np.sqrt(((x1 - x2) ** 2) + ((y1 - y2) ** 2)).item()
 
     def close(self):
         if self.viewer:
diff --git a/dizoo/gym_hybrid/envs/gym_hybrid_env.py b/dizoo/gym_hybrid/envs/gym_hybrid_env.py
index bc0f544374..9f02925d1a 100644
--- a/dizoo/gym_hybrid/envs/gym_hybrid_env.py
+++ b/dizoo/gym_hybrid/envs/gym_hybrid_env.py
@@ -88,18 +88,6 @@ def step(self, action: Dict) -> BaseEnvTimestep:
         if self._save_replay:
             self._frames.append(self._env.render(mode='rgb_array'))
         obs, rew, done, info = self._env.step(action)
-        self._eval_episode_return += rew
-        if done:
-            info['eval_episode_return'] = self._eval_episode_return
-            if self._save_replay:
-                if self._env_id == 'HardMove-v0':
-                    self._env_id = f'hardmove_n{self._cfg.num_actuators}'
-                path = os.path.join(
-                    self._replay_path, '{}_episode_{}.gif'.format(self._env_id, self._save_replay_count)
-                )
-                self.display_frames_as_gif(self._frames, path)
-                self._frames = []
-                self._save_replay_count += 1
 
         obs = to_ndarray(obs)
         if isinstance(obs, list):  # corner case
@@ -114,6 +102,18 @@ def step(self, action: Dict) -> BaseEnvTimestep:
         if isinstance(rew, list):
             rew = rew[0]
         assert isinstance(rew, np.ndarray) and rew.shape == (1, )
+        self._eval_episode_return += rew.item()
+        if done:
+            info['eval_episode_return'] = self._eval_episode_return
+            if self._save_replay:
+                if self._env_id == 'HardMove-v0':
+                    self._env_id = f'hardmove_n{self._cfg.num_actuators}'
+                path = os.path.join(
+                    self._replay_path, '{}_episode_{}.gif'.format(self._env_id, self._save_replay_count)
+                )
+                self.display_frames_as_gif(self._frames, path)
+                self._frames = []
+                self._save_replay_count += 1
         info['action_args_mask'] = np.array([[1, 0], [0, 1], [0, 0]])
         return BaseEnvTimestep(obs, rew, done, info)