Tā fānyúnfùyǔ de shǒuduàn ràng suǒyǒu rén dōu mō bu qīng tā de lìchǎng.
Her manipulative ways made it impossible for anyone to know her true position.
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From a poem by Du Fu (杜甫, 712–770 AD): 翻手作云覆手雨 — 'flip the hand and make clouds, turn it over and make rain.' He used it to criticize the fickle nature of powerful people who change alliances without scruple.