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
50 Meters West of Intersection of Grade-9 Industry Park Road and Shanshui Road, Zhuliu Subdistrict, Changle County, Weifang Shandong, Weifang, Shandong, China, 261041