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 1306, 13th Floor, Huitong Building, 10 Longgang Road, Longgang Street, Longgang District, Shenzhen City, Guangdong Province, Shenzhen, Guangdong, China