way/direction the wind blows idiom
看看风向，了解情况，探查形势
If a person tries to discover which way the wind blows/is blowing, they try to discover information about a situation, especially other people's opinions, before they take action.
I think I'll see which way the wind is blowing before I vote at the board meeting. 在董事会上投票之前，我想要先看看风朝哪边吹。