Within 30 days. According to the official website, the receipt of Weinan housing provident fund must be returned to Weinan provident fund account within 30 days, because the balance of the provident fund account must be settled on the provident fund trading platform. If the balance is insufficient or incorrect, it will affect the subsequent investment and consumption operations. Provident fund receipt is a valid voucher produced by the Provident Fund Management Office after handling business in the Provident Fund Management Center, which can prove that you have handled a certain business, but it is best to destroy it after use, because the receipt will leave some transaction information.