The Art. 58 of UN Convention on the International Sale of Goods (hereinafter referred to briefly as CISG) provides the issue that when the buyer is bound to pay to the seller during the performance of the contract. It also provides when the buyer's right to inspect conflicts with his payment obligations, how to handle it. These provide a legal basis for sellers and buyers to fulfill their obligations better, and to avoid adding the contract dispute to both parties due to a loophole in the law.