The number of wedding banquet is generally determined one or six months in advance. Generally, the hotel that can undertake the wedding ceremony needs to book one year or half a year in advance, and it needs to provide the hotel with the number of participants in the banquet at the time of booking. Moreover, the wedding celebration is not only a banquet but also a series of related wedding planning, and the scene planning can only be carried out after determining the specific venue. Therefore, the approximate number of people attending the wedding banquet also needs to determine the approximate number of people one year or six months in advance.