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 102, 1st Floor, West Office Building, West of Minzhu Village, Yangshui Town, Anci District, Langfang City, Hebei Province (Langfang Yongxin Industrial Co.,