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
Floor 3-5, Building B, Penglongpan High-Tech Park, Dafu 2nd Road, Dafu Industrial Zone, Guanlan Street, Longhua District, Shenzhen, Guangdong, China