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
West Side of Room 1002, No. 2, Zhonghai Building, No. 426, Haichang South Road, Haizhou Street, Haining City, Jiaxing City, Jiaxing, Zhejiang, China