On the wedding day, both parents should dress generously and simply, and dad should dress formally, and a coat should be dark in color. Mom can wear Chinese clothes, especially formal clothes and suits, to show the dignity of her elders.
If the child is a western-style wedding, the father chooses a dark suit; If it is a Chinese wedding, it should be matched with a stand-up tunic suit or a Tang suit. In collocation, don't choose too conspicuous ties with dark clothes. It is also a very good way to match the tie by looking at the dress color of the lady around you. It is best to have a uniform color between the two.