古人有裴矩，他前半辈子在隋朝做官，是一个以阿谀奉承、逢迎拍马而著称的谀臣。可归顺唐朝后，他却成了敢于直言相谏的诤臣。元朝英宗皇帝对此颇为不解，于是问丞相拜往。拜往答：“盘圆水圆，盂方水方”，裴矩遇杨广这“圆盘子”就是八面玲珑的圆滑之臣，逢李仕民这个“方盘 The ancients had Pei Mo, who worked as an official in the Sui Dynasty for the rest of his life. He is a minister who is known for his flattery and flattering. After returning to the Tang Dynasty, he became a minister who dared to speak out. Yuan Dynasty Emperor Yingzong quite puzzled, so ask the prime minister to visit. Thanks to the A: “round round water, Yu Fang water side”, Pei Mo Yuanyang Yang this “disc” is smooth and sleek, graceful minister, every Li Shimin this "square plate