Marriage, considered by the majority as a once-in-a-lifetime ceremony, is of great importance to people not only because of its significance but also because of the enormous cost it behind it lies a beautiful scene and touching promises. People have complained about the lack of information on wedding prices and have argued for a standard price in the wedding industry. However, the truth is that there will be no standard price and price information will continue to be asymmetric. The special meaning of marriage makes it a unique product that varies continuously in each individual case. There is no one way to design a wedding template that works for most people. Following the logic of once in a lifetime things, couples tend to make it as personal as possible. Even if only one part of the couple has the passion to do it, the other will always cooperate in this case to demonstrate his sincerity in this marriage. Furthermore, it is even impossible for a wedding vendor to provide the price in advance. How can the vendor pre-price an event or wedding when you have no idea what the customers' expectations are? Among those wildly of...