Excuse me, people who know Feng Shui, can the west room on the second floor open a window facing west?

On the west is the white tiger position, which is a fierce position. It is generally advisable not to open the door. It is ok to open the window, but it is not too big. It's better to be slightly smaller than your south window. Venetian blinds or curtains can be placed, and a string of five emperors' money can be hung on the windowsill, one to block the western sun and the other to resist suffocation.

It is difficult for modern homes to strictly abide by the traditional geomantic theory. Generally speaking, as long as you don't violate taboos and feel comfortable.