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 1501-1503, Jinxinhongdu Building, Meilong Road and Bulong Road Minzhi Street, Longhua District, Shenzhen, Guangdong, China, Zip Code: 518131