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
Lianhezhong Industrial Park, Supply And Marketing Cooperative Industrial, Bao'an Guanlan, Guanlan Road, Guanlan Town, Bao'an, Shenzhen, Guangdong, China