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 302, 35 Zhongsheng Road, Shengshi Industrial Zone, Zhongchuang Road, Shengshi Village, Zhongcun Street, Panyu District, Guangzhou, Guangdong, China