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 1430, 8th Floor, Unit 1, Building 18, Weilai City, No. 916, Sanba East Road, Changhe Street, Tianqu New District, Dezhou, Shandong, China, 253000