you can't sleep soundly on the side of the couch.

Story: In 96, Zhao Kuangyin founded the Song Dynasty. He adopted a divide-and-conquer strategy and successively conquered Jingnan, Hunan, Houshu and other countries. In 974, he called Li Yu, the queen of the Southern Tang Dynasty, to appear before Bianjing. Li Yu was worried that he would be detained, so he sent Xu Xuan to Bianjing for peace. Song Taizu said bluntly: "On the side of the couch, do you allow others to snore and sleep?"