Desc: Pi cheng: Directed by Liang Sun. With Chenglong Ma, Xinming Dai, Dongqing Zhu, Libin Xiao. The factory was shut down and Zhang Jinsheng had nowhere to go. He wandered alone in the factory, and a strange sound led him into another world. Sometimes it was snowing heavily, sometimes it was quiet and desolate. He saw a different version of himself.