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.
Nearest Port
Shenzhen YanTian
Address
Room 202, Building 20, Qinghu Industrial City, No. 438 Dahe Road, Qinghu Community, Longhua Street, Longhua District, Shenzhen