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 202, Building 1, Yinghai Technology Park, Maozhoushan Industrial Zone, Houting Community, Shajing Street, Bao'an District, China 51810, Shenzhen, Guangdong, China