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 123, Industrial Park Apartment Building, No. 113, Xiang Xi Xin Wei, Song Yuan Xia Community, Guan Hu Street, Long Hua District, Shenzhen, Guangdong, China