The general "online signing" procedure is as follows: the two parties to the transaction negotiate and formulate relevant terms according to the text of the commercial housing deposit agreement or the sales contract published online; The real estate development enterprise prints the agreement or contract confirmed by both parties through the online signing system; Signature (seal) of both parties; Indicate on the electronic property list that the commercial house has been booked or signed. Acceptance and approval of housing provident fund center: the municipal housing provident fund center accepts the information of loan applicants, and approves and determines the loan amount and duration.