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
4 Floor, C Building, Kaihuimao Technology R&D Industrial Park, Jingfang Road, Fuhai Street, Baoan District, Shenzhen City, Shenzhen, Guangdong, China, 518100