What does the real estate agent mean by sincerity money?

Sincerity fund, namely intention fund, is a name from Chinese mainland, Hongkong and Taiwan Province in 1990s. This is reflected in the contract signed by the real estate agent and the buyer and seller. In fact, there is no such thing as sincerity money in law, and "sincerity money" is not a penalty, deposit or security deposit in the legal sense. "Sincere money" does not have the nature of contract validity and legal protection. "Sincerity money" is a marketing method, which promises certain discounts to buyers while collecting "sincerity money" to stimulate their enthusiasm; In addition, through the collection of "sincerity gold", the order of house selection for buyers is determined, and the order of house purchase is maintained.