There is no special requirement for dress in the ID photos of foreign universities, as long as the posture is generous, and you can't wear fancy clothes at will. The photos should be clear, so as to see the appearance clearly. Finally, you can wear a formal suit to take pictures.

A tie is a collared dress, which is tied on the collar of a shirt and on the chest, including a bow tie in a broad sense. Usually used with suits, it is the most basic clothing for people (especially men) to get married and in their daily lives.