和妈妈坐火车卧铺去北京

Yan Xishuang and Shi Yishuang's names both have the word "shuang". Both of them looked a little cold. In Ning Cheng's view, these are two different types of coldness. Shi Yishuang always thought that he was superior to others, while Yan Xishuang just had that cold personality....