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
2/F, Building C, No. 6 West Dong'an Rd, Haizhou Guzhen, Zhongshan Guangdong, China(Resindence Declaration), Zhongshan, Guangdong, China