It is very important for Brazilian companies to use the file CONTRATO SOCIAL (Articles of Association = Business License) >, because it can show the company's shareholders, addresses, investments, share distribution, managers and other related information.

and

CNPJ (tax registration certificate) > It is very important to show its legal registration with the Brazilian State Taxation Bureau.

Compared with China, it's a little different, but he will know these documents. In addition, in order to ensure trade safety, it is best to ask the other party to provide notarized copies or Chinese translations of the above documents. Good luck! !