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
13/F, Rm#1313a, Dongjiu Chuangxinkejiyuan, Phase#2, Building#6, Nanwan Street Area, Longgang District, Shenzhen, Guangdong, China
