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 2417, Building 3, Jiangning Wanda Plaza (West Area), No. 9, Fuqian East Road, Dongshan Street, Jiangning District, Nanjing, Jiangsu, China