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 5409, Building 1, Excellence Century Center, No. 31, Longcheng Road, Shibei District, Qingdao City, Shandong Province, Qingdao, Shandong, China, 266034