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 306, (Liangchuang Business Center), No. 526, Longping East Road, Shengping Community, Longcheng Street, Longgang District, Shenzhen, Guangdong, China, 518000