重三叠四

Explanation: Described repeatedly. 　　Source: Song Xi "ZHUAIYULE" Volume hundred and twelve: "The official re-Triassic toward building four, the number of workers scrambling! This to be much more painful reforms of the post." And Volume hundred and eighteen: " The book said only a token, all four said that reasonable re-Triassic, but a lot of head, face it. " Thesaurus:  Four re-Triassic