[见风使舵 / 見風使舵, jiàn fēng shǐ duòㄐㄧㄢˋ ㄈㄥ ㄕˇ ㄉㄨㄛˋ] lit. see the wind and set the helm (成语 saw); fig. to act pragmatically; to be flexible and take advantage of the situation#68030
[避其锐气击其惰归 / 避其銳氣擊其惰歸, bì qí ruì qì jī qí duò guīㄅㄧˋ ㄑㄧˊ ㄖㄨㄟˋ ㄑㄧˋ ㄐㄧ ㄑㄧˊ ㄉㄨㄛˋ ㄍㄨㄟ] avoid the enemy when he is fresh and strike him when he is tired and withdraws
[随风倒舵 / 隨風倒舵, suí fēng dǎo duòㄙㄨㄟˊ ㄈㄥ ㄉㄠˇ ㄉㄨㄛˋ] lit. to trim one's sail to the wind; fig. to adopt different attitude depending on the circumstances; unprincipled