China Customs announcement No.56 (Nov. 21, 2017) requires that as of June 1, 2018, shipments arriving in China must provide China Customs with the firm/corporate/company registration code of shipper, consignee and notify party (when applicable).
The registration code for consignee and notify party in China will be the “Unified Social Credit Code” with 18 digits. The registration code for the overseas shipper will vary from country to country. For example, it could be the EIN (Employer Identification Number) in the U.S., Government Uniform Invoice (GUI) number in Taiwan, or any other codes that serves the purpose for business registration.
In addition to the registration code, the telephone or fax number for shipper, consignee and notify party (when applicable) will also be mandatory.