The payment of abs principal and interest for the final payment of house purchase is the payment of ABS principal and interest for the final payment. After the buyer signs the commercial housing sales contract with the project company and pays the down payment, he chooses bank loans or provident fund loans to pay the subsequent payments, which constitute the basic assets. Internal collection of basic assets: the project company signed an account receivable transfer agreement with the original creditor, and transferred the remaining funds of several project companies to the original creditor for easy collection.