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
Floor 11, Building 1, Yishang Sanwei Industry Building, No. 642-2, Zhoushi Road, Hangcheng Street Shenzhen Guangdong China, Shenzhen, Guangdong, China