A visit — yours or an inspector's — is the surest check on a new supplier. Send a date and what you want to see; the request reaches them as an enquiry you can track.
Address
Room 428, 4th Floor, Building C, Fengchi Automobile Bonded Exhibition Center, No. 1166 Chongqing Road, Tianjin Pilot Free Trade Zone (East Xinjiang Comprehensiv