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 Port
Address
Room 1807, Building A, , Zhengwuwei Garden, Guantian, Shiyan Sub-District, Bao'an District, Shenzhen City, 518052