翻手为云，覆手为雨（翻手爲雲，覆手爲雨）　

◎ 翻手为云，覆手为雨 fān shǒu wéi yún,fù shǒu wéi yǔ

[as changeable as the moon;blow hot and cold] 手向上翻时是云,手向下翻是雨。比喻反复无常或善于耍手段、弄权术