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
Block B, 4th Floor, Building 02, Zhong'an Innovation Enterprise Incubation Park, No. 8 Beiwang West Road, Doulang Village, Zhongtang Town, Dongguan City