笑比河清

Explanation: Describe the attitude of serious, difficult to see smile. 　　Usage: Partial official; as predicate, object, complement; describe the attitude of serious 　　Source: "History of the Song Chuan Bao Zheng" stand toward the fortitude, Guiqi eunuch whom Lianshou, heard by key dread it. People laugh than to Bao Zheng Qing Huang. "