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
1st Floor, Building 6, Liandong U Valley No. 510 Xihuan Road, Houjie Town Dongguan, Guangdong 523961, Shenzhen, Guangdong, China, 523949