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
6th Floor, a-2 Block, Wanhao Industrial Building, Hengxing Road, Tongyi Industrial Park, Guzhen Town, Zhongshan City, Guangdong China, Zhongshan, Guangdong, China