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
No. 1 Yuyuan Road, Bei Cheng Community, Subdistrict Office, Sanyuan County, Xian Yang City, Shaanxi Procvince, Xi'an, Shaanxi, China