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 1020, Building B1, Ping an (Zengcheng) Technology Silicon Valley, No. 76, Chuangyu Road, Ningxi Street, Zengcheng District, Guangzhou, Guangdong, China