diff --git a/Gallery.md b/Gallery.md
index 0aae524..7bf4e4c 100644
--- a/Gallery.md
+++ b/Gallery.md
@@ -41,7 +41,7 @@ Users are also welcome to contribute their own training examples and demos to th
 |                [JRPO](https://arxiv.org/abs/2302.07515)                |                                                                 ![MARL](https://img.shields.io/badge/-MARL-yellow)                                                                  |                  [code](./examples/mpe/)                   |
 |                [GAIL](https://arxiv.org/abs/1606.03476)                |                                                            ![offline](https://img.shields.io/badge/-offlineRL-darkblue)                                                             |                  [code](./examples/gail/)                  |
 | [Behavior Cloning](http://www.cse.unsw.edu.au/~claude/papers/MI15.pdf) |                                                            ![offline](https://img.shields.io/badge/-offlineRL-darkblue)                                                             |            [code](./examples/behavior_cloning/)            |
-|                [A2C](https://arxiv.org/abs/1602.01783)                 |                                                             ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                                   |                   [code](./examples/cartpole/)                   |
+|                [A2C](https://arxiv.org/abs/1602.01783)                 |                                                           ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                           |                [code](./examples/cartpole/)                |
 |                               Self-Play                                |                              ![selfplay](https://img.shields.io/badge/-selfplay-blue) ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                               |                [code](./examples/selfplay/)                |
 |                 [DQN](https://arxiv.org/abs/1312.5602)                 | ![discrete](https://img.shields.io/badge/-discrete-brightgreen)   ![value](https://img.shields.io/badge/-value-orange)   ![offpolicy](https://img.shields.io/badge/-offpolicy-blue) | [code](./examples/toy_env)   [code](./examples/gridworld/) |
 |                [MAT](https://arxiv.org/abs/2205.14953)                 |                                 ![MARL](https://img.shields.io/badge/-MARL-yellow)  ![Transformer](https://img.shields.io/badge/-Transformer-blue)                                  |                  [code](./examples/mpe/)                   |
@@ -55,22 +55,23 @@ Users are also welcome to contribute their own training examples and demos to th
 
 <div align="center">
 
-|                                                                                                        Environment/Demo                                                                                                        |                                                                                           Tags                                                                                            |                  Refs                   |
-|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:---------------------------------------:|
-|                                                       [MuJoCo](https://github.com/deepmind/mujoco)<br>  <img width="300px" height="auto" src="./docs/images/mujoco.png">                                                       |                                                               ![continuous](https://img.shields.io/badge/-continous-green)                                                                |       [code](./examples/mujoco/)        |
-|                                    [CartPole](https://gymnasium.farama.org/environments/classic_control/cart_pole/)<br>  <img width="300px" height="auto" src="./docs/images/cartpole.png">                                    |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |      [code](./examples/cartpole/)       |
-|                            [MPE: Simple Spread](https://pettingzoo.farama.org/environments/mpe/simple_spread/)<br>  <img width="300px" height="auto" src="./docs/images/simple_spread_trained.gif">                            |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |         [code](./examples/mpe/)         |
-|                                                      [StarCraft II](https://github.com/oxwhirl/smac)<br>  <img width="300px" height="auto" src="./docs/images/smac.png">                                                       |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |        [code](./examples/smac/)         |
-|                                                        [SMACv2](https://github.com/oxwhirl/smacv2)<br>  <img width="300px" height="auto" src="https://github.com/oxwhirl/smacv2/raw/main/docs/imgs/reflect.png">                                                         |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |       [code](./examples/smacv2/)        |
-|                                    [Chat Bot](https://openrl-docs.readthedocs.io/en/latest/quick_start/train_nlp.html)<br>  <img width="300px" height="auto" src="./docs/images/chat.gif">                                     | ![discrete](https://img.shields.io/badge/-discrete-brightgreen)        ![NLP](https://img.shields.io/badge/-NLP-green)     ![Transformer](https://img.shields.io/badge/-Transformer-blue) |         [code](./examples/nlp/)         |
-|                                            [Atari Pong](https://gymnasium.farama.org/environments/atari/pong/)<br>  <img width="300px" height="auto" src="./docs/images/pong.png">                                             |                                 ![discrete](https://img.shields.io/badge/-discrete-brightgreen)        ![image](https://img.shields.io/badge/-image-red)                                  |        [code](./examples/atari/)        |
-|                              [PettingZoo: Tic-Tac-Toe](https://pettingzoo.farama.org/environments/classic/tictactoe/)<br>  <img width="300px" height="auto" src="./docs/images/tic-tac-toe.jpeg">                              |                                ![selfplay](https://img.shields.io/badge/-selfplay-blue)    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                |      [code](./examples/selfplay/)       |
-|                            [DeepMind Control](https://shimmy.farama.org/environments/dm_control/)<br>  <img width="300px" height="auto" src="https://shimmy.farama.org/_images/dm_locomotion.png">                             |                                                               ![continuous](https://img.shields.io/badge/-continous-green)                                                                |     [code](./examples/dm_control/)      |
-| [Omniverse Isaac Gym](https://github.com/NVIDIA-Omniverse/OmniIsaacGymEnvs)<br>  <img width="300px" height="auto" src="https://user-images.githubusercontent.com/34286328/171454189-6afafbff-bb61-4aac-b518-24646007cb9f.gif"> |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |        [code](./examples/isaac/)        |
-|                                                   [Snake](http://www.jidiai.cn/env_detail?envid=1)<br>  <img width="300px" height="auto" src="./docs/images/snakes_1v1.gif">                                                   |                                 ![selfplay](https://img.shields.io/badge/-selfplay-blue)  ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                 |        [code](./examples/snake/)        |
-|                                          [gym-pybullet-drones](https://github.com/utiasDSL/gym-pybullet-drones)<br>  <img width="300px" height="auto" src="./docs/images/drone.png">                                           |                                                             ![continuous](https://img.shields.io/badge/-continous-green)                                                                 | [code](./examples/gym_pybullet_drones/) |
-|                                                          [GridWorld](./examples/gridworld/)<br>  <img width="300px" height="auto" src="./docs/images/gridworld.jpg">                                                           |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |      [code](./examples/gridworld/)      |
-|     [Super Mario Bros](https://github.com/Kautenja/gym-super-mario-bros)<br>  <img width="300px" height="auto" src="https://user-images.githubusercontent.com/2184469/40948820-3d15e5c2-6830-11e8-81d4-ecfaffee0a14.png">      |                                   ![discrete](https://img.shields.io/badge/-discrete-brightgreen)     ![image](https://img.shields.io/badge/-image-red)                                   |     [code](./examples/super_mario/)     |
-|                                                     [Gym Retro](https://github.com/openai/retro)<br>  <img width="300px" height="auto" src="./docs/images/gym-retro.jpg">                                                      |                                   ![discrete](https://img.shields.io/badge/-discrete-brightgreen)     ![image](https://img.shields.io/badge/-image-red)                                   |        [code](./examples/retro/)        |
+|                                                                                                                                                         Environment/Demo                                                                                                                                                          |                                                                                           Tags                                                                                            |                  Refs                   |
+|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:---------------------------------------:|
+|                                                                                                        [MuJoCo](https://github.com/deepmind/mujoco)<br>  <img width="300px" height="auto" src="./docs/images/mujoco.png">                                                                                                         |                                                               ![continuous](https://img.shields.io/badge/-continous-green)                                                                |       [code](./examples/mujoco/)        |
+|                                                                                     [CartPole](https://gymnasium.farama.org/environments/classic_control/cart_pole/)<br>  <img width="300px" height="auto" src="./docs/images/cartpole.png">                                                                                      |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |      [code](./examples/cartpole/)       |
+|                                                                             [MPE: Simple Spread](https://pettingzoo.farama.org/environments/mpe/simple_spread/)<br>  <img width="300px" height="auto" src="./docs/images/simple_spread_trained.gif">                                                                              |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |         [code](./examples/mpe/)         |
+|                                                                                                        [StarCraft II](https://github.com/oxwhirl/smac)<br>  <img width="300px" height="auto" src="./docs/images/smac.png">                                                                                                        |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |        [code](./examples/smac/)         |
+|                                                                                     [SMACv2](https://github.com/oxwhirl/smacv2)<br>  <img width="300px" height="auto" src="https://github.com/oxwhirl/smacv2/raw/main/docs/imgs/reflect.png">                                                                                     |                                    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)  ![MARL](https://img.shields.io/badge/-MARL-yellow)                                    |       [code](./examples/smacv2/)        |
+|                                                                                      [Chat Bot](https://openrl-docs.readthedocs.io/en/latest/quick_start/train_nlp.html)<br>  <img width="300px" height="auto" src="./docs/images/chat.gif">                                                                                      | ![discrete](https://img.shields.io/badge/-discrete-brightgreen)        ![NLP](https://img.shields.io/badge/-NLP-green)     ![Transformer](https://img.shields.io/badge/-Transformer-blue) |         [code](./examples/nlp/)         |
+|                                                                                              [Atari Pong](https://gymnasium.farama.org/environments/atari/pong/)<br>  <img width="300px" height="auto" src="./docs/images/pong.png">                                                                                              |                                 ![discrete](https://img.shields.io/badge/-discrete-brightgreen)        ![image](https://img.shields.io/badge/-image-red)                                  |        [code](./examples/atari/)        |
+|                                                                               [PettingZoo: Tic-Tac-Toe](https://pettingzoo.farama.org/environments/classic/tictactoe/)<br>  <img width="300px" height="auto" src="./docs/images/tic-tac-toe.jpeg">                                                                                |                                ![selfplay](https://img.shields.io/badge/-selfplay-blue)    ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                |      [code](./examples/selfplay/)       |
+|                                                                              [DeepMind Control](https://shimmy.farama.org/environments/dm_control/)<br>  <img width="300px" height="auto" src="https://shimmy.farama.org/_images/dm_locomotion.png">                                                                              |                                                               ![continuous](https://img.shields.io/badge/-continous-green)                                                                |     [code](./examples/dm_control/)      |
+|                                                  [Omniverse Isaac Gym](https://github.com/NVIDIA-Omniverse/OmniIsaacGymEnvs)<br>  <img width="300px" height="auto" src="https://user-images.githubusercontent.com/34286328/171454189-6afafbff-bb61-4aac-b518-24646007cb9f.gif">                                                   |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |        [code](./examples/isaac/)        |
+|                                                                                                    [Snake](http://www.jidiai.cn/env_detail?envid=1)<br>  <img width="300px" height="auto" src="./docs/images/snakes_1v1.gif">                                                                                                     |                                 ![selfplay](https://img.shields.io/badge/-selfplay-blue)  ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                 |        [code](./examples/snake/)        |
+|                                                                                            [gym-pybullet-drones](https://github.com/utiasDSL/gym-pybullet-drones)<br>  <img width="300px" height="auto" src="./docs/images/drone.png">                                                                                            |                                                               ![continuous](https://img.shields.io/badge/-continous-green)                                                                | [code](./examples/gym_pybullet_drones/) |
+| [EnvPool](https://github.com/sail-sg/envpool)<br>  <img width="300px" height="auto" src="https://camo.githubusercontent.com/79afc4dc2741dd3a0b961979cbc5691349556bc367a6719c5e4b38924369bba2/68747470733a2f2f656e76706f6f6c2e72656164746865646f63732e696f2f656e2f6c61746573742f5f7374617469632f656e76706f6f6c2d6c6f676f2e706e67"> |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |       [code](./examples/envpool/)       |
+|                                                                                                            [GridWorld](./examples/gridworld/)<br>  <img width="300px" height="auto" src="./docs/images/gridworld.jpg">                                                                                                            |                                                              ![discrete](https://img.shields.io/badge/-discrete-brightgreen)                                                              |      [code](./examples/gridworld/)      |
+|                                                       [Super Mario Bros](https://github.com/Kautenja/gym-super-mario-bros)<br>  <img width="300px" height="auto" src="https://user-images.githubusercontent.com/2184469/40948820-3d15e5c2-6830-11e8-81d4-ecfaffee0a14.png">                                                       |                                   ![discrete](https://img.shields.io/badge/-discrete-brightgreen)     ![image](https://img.shields.io/badge/-image-red)                                   |     [code](./examples/super_mario/)     |
+|                                                                                                       [Gym Retro](https://github.com/openai/retro)<br>  <img width="300px" height="auto" src="./docs/images/gym-retro.jpg">                                                                                                       |                                   ![discrete](https://img.shields.io/badge/-discrete-brightgreen)     ![image](https://img.shields.io/badge/-image-red)                                   |        [code](./examples/retro/)        |
 
 </div>
\ No newline at end of file
diff --git a/README.md b/README.md
index 4c0e6a4..2c9ef71 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,7 @@ Environments currently supported by OpenRL (for more details, please refer to [G
 - [DeepMind Control](https://shimmy.farama.org/environments/dm_control/)
 - [Snake](http://www.jidiai.cn/env_detail?envid=1)
 - [gym-pybullet-drones](https://github.com/utiasDSL/gym-pybullet-drones)
+- [EnvPool](https://github.com/sail-sg/envpool)
 - [GridWorld](./examples/gridworld/)
 - [Super Mario Bros](https://github.com/Kautenja/gym-super-mario-bros)
 - [Gym Retro](https://github.com/openai/retro)
diff --git a/README_zh.md b/README_zh.md
index 42565cc..ed86c7e 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -97,6 +97,7 @@ OpenRL目前支持的环境（更多详情请参考 [Gallery](Gallery.md)）：
 - [DeepMind Control](https://shimmy.farama.org/environments/dm_control/)
 - [Snake](http://www.jidiai.cn/env_detail?envid=1)
 - [gym-pybullet-drones](https://github.com/utiasDSL/gym-pybullet-drones)
+- [EnvPool](https://github.com/sail-sg/envpool)
 - [GridWorld](./examples/gridworld/)
 - [Super Mario Bros](https://github.com/Kautenja/gym-super-mario-bros)
 - [Gym Retro](https://github.com/openai/retro)
diff --git a/examples/envpool/train_ppo.py b/examples/envpool/train_ppo.py
index b6550b9..611b0b4 100644
--- a/examples/envpool/train_ppo.py
+++ b/examples/envpool/train_ppo.py
@@ -20,7 +20,6 @@
 
 from examples.envpool.envpool_wrappers import VecAdapter, VecMonitor
 from openrl.configs.config import create_config_parser
-from openrl.modules.common import PPONet as Net
 from openrl.modules.common.ppo_net import PPONet as Net
 from openrl.runners.common import PPOAgent as Agent