You can buy it in advance! After you and your wife make an appointment to go to Yuelao, Yuelao will let you choose a luxurious or ordinary wedding, and then let you buy the corresponding invitation! At this point, the banner "Congratulations ..." will appear in the system. You ask all your friends to go to Luoyang Square (not a competition) to celebrate their birthdays. Then you invite them for their birthday, and they will enter your wedding scene!