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
A3-1, Floor 4, Building A2, Xuxingda Industrial Zone, Zhoushi Road, Shixin, Langxin Community, Shiyan Street, Bao 'an District, Shenzhen, Guangdong,China