Pei Jingsheng believed that opening a door was a form of wisdom. The first time he opened the door, behind it was a frightened rabbit named Nuna. The second time he opened the door, behind it was a peach named Nuna, calling him brother. The third time he opened the door, the fourth time... In the end, Pei Jingsheng didn't even need to do it himself; the door opened. Open the door! Open the door! Open the door!