MLS (Multiple Listing Services), Chinese called multiple listing system, is widely used in real estate development and sales as well as intermediary agents. MLS integrates different real estate brokerage companies into a franchise system in the form of a membership alliance, and the listings and purchase information of members in the system are collected in a shared database on a website. MLS.com provides the search service of these shared data free of charge. After each member joining MLS signs an entrusted sales or entrusted purchase contract with the customer, he will enter this information into the system of the website, and all members participating in the system will jointly help find buyers. Or the seller, to realize the transaction.