看风使舵

看风使舵 [kàn fēng shǐ duò]

1. ■ trim one's sails; adapt oneself to circumstances; change course for convenience; cut the rudder to the wind; see [watch] how [which way] the cat jumps; see how the gander hops; see which way the wind blows; serve the time; steer according to the wind; test which way the wind blows; trim one's [the] sails to the wind; veer with the wind:

他真会看风使舵， 口吻也马上变得温和了。 Steering according to the wind, he also framed his words more amicably.