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
2nd Floor, Building 2, Xinweirun High Tech Park, No. 162 Shajiang Road, Xitou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China