Legal basis: Article 79 of the Regulations for the Implementation of the Trademark Law of People's Republic of China (PRC). The following circumstances belong to the circumstances stipulated in Article 60 of the Trademark Law that can prove that the goods are legally obtained by oneself: (1) There is a supply list and payment receipt legally signed by the supplier, which is verified or recognized by the supplier; (2) There is a procurement contract signed between the supplier and the supplier, which has been verified and truly fulfilled; (3) There are legal purchase invoices, and the items recorded in the invoices are consistent with the commodities involved; (4) Other circumstances that can prove the legal acquisition of the commodities involved.