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
Commerce-Residence Building C201, Liuxianju North13th, Shixin Road, Liuxian Community, Xili Street, Nanshan District, Shenzhen City, Shenzhen, Guangdong, China