According to Article 161 of the contract law,where there is no agreement or the agreement is not clear between the two parties of the contract as to the time to make the payment,and it cannot be determined with reference to article 61,the purchaser should make the payment when he received the subject matter or its document.Therefore,the limitation of action begins with the delivery of the subject matter.However,such provisions result in errors in counting the beginning of the limitation of action because of the controversy in the legal theory and defect in the practice.Unfortunately,irrelevant...