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.
Nearest Port
Qingdao
Address
Room 1501 15/F, Tower B No. 267 Yihe Building Jinjing Avenue, Zhangdian Dist, Zibo, Shandong, China, 255086