Wedding invitations (no matter what banquet) cannot be less than 3 days ago. It doesn't matter whether there is a written letter or email. Accompanying gifts depends on whether I am willing or not. I don't have to go if I am invited. Don't go if you don't want to accompany the ceremony. The best way to invite classmates and colleagues normally is, XXX, I got married that day. Please help me receive our classmates. I invite anyone, in fact, not to do anything, but to make the other person pay attention and can't refuse.