Well, first order a wedding dress (a man's dress and a woman's dress), as well as jewelry and wigs. You can go to Dream Dress, Nilou and Hanyin Pavilion to order a set, which takes about a month. So book in advance, or you may not get clothes during the Spring Festival.
Do the groomsmen and bridesmaids need to wear Hanfu? You can rent this from a businessman. If you think the wedding dress is too expensive, you can rent it