The United Nations Convention on Contracts for the International Sale of Goods (CISG) is a crucial treaty in the realm of international trade, significantly influencing the global exchange of goods. However, due to the complexities of international trade, diverse legal customs and interests across countries, and the obscure wording of the convention, various ambiguities arise in the interpretation and application of certain provisions, particularly Article 42. This paper aims to dissect the legal basis of this article, elucidate its true meaning, and ultimately establish a correct understanding and application approach.