改玉改行

Explanation: See "to step change the jade." 　　Source: "Singer of the song in the" Lord Wen established King Xiang Yu Jia, Wang workers of the land, speech, please tunnel Yan. Wang allowed, said, '... ... to change our ancestors have Yanyue Yu diverted. "'" Thesaurus:  Gaibugaiyu, Gaiyugaibu