According to Announcement No. 129 of the General Administration of Customs in 2020 on Issues related to the Inspection and Supervision of Machinery Packaging for Import and Export of Hazardous Chemicals, China’s international trade single window has adjusted the declaration system for goods. When applying for the import of hazardous chemicals, enterprises need to provide four types of accompanying documents: a declaration of conformity, a description of the inhibitor or stabilizer situation, a hazardous formula label, and a safety data sheet based on the product situation.