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
Room 405, Sino-Russian Science and Innovation Park, No.8, No.39 Keji Avenue, Mashan Subdistrict, High-tech Zone, Yantai City, Shandong Province, 264000