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
Shanghai/Shenzhen/Beijing
Address
Changsha Yingtai Instrument Co.,ltd Building A3, Lian Dong Jin Yu Industrial Center, Wangcheng Economic Development Zone, Wangcheng District, Changsha City., 410205