Legal Basis: Interpretation of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Disputes over Commercial Housing Sales Contracts Article 13 If the commercial housing sales contract does not stipulate the calculation method of liquidated damages or damages, the liquidated damages or damages can be determined with reference to the following standards: if the payment is overdue, it shall be calculated according to the total unpaid purchase price and with reference to the standard for financial institutions to collect overdue loan interest stipulated by the People's Bank of China. Overdue delivery, in accordance with the relevant authorities announced or qualified real estate assessment agencies to assess the same lot of similar housing rent standards during the overdue delivery.