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 2317, Block B, Hisense Tianchen No. 9, No. 299 Tianchen Road, Jinan Area, China (Shandong) Pilot Free Trade Zone, Jinan, Shandong, China