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
201-3, Building F5, Tcl Science Park, No. 1001 Zhongshan Garden Road, Shuguang Community, Xili Street, Nanshan District, Shenzhen, Guangdong, China