According to the 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, if the absolute value of the area error ratio exceeds 3%, the buyer's request to cancel the contract and return the paid purchase price and interest shall be supported.
The buyer agrees to continue to perform the contract. If the actual area of the house is larger than the area agreed in the contract, the house price with an area error ratio of less than 3% (including 3%) shall be supplemented by the buyer at the agreed price, and the house price with an area error ratio of more than 3% shall be borne by the real estate developer, and the ownership shall belong to the buyer; If the actual area of the house is less than the area agreed in the contract, the real estate developer shall return the house price and interest for the part with an area error ratio of less than 3%, and the real estate developer shall return the house price for the part with an area error ratio of more than 3% to the buyer twice. Where there are other provisions in the contract, such provisions shall prevail.