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telephone：(86) 18682158983
(86) 15013815121 （same as whatsapp）

email: yu.martin-usp@vip.163.com
anquanyong@szzwgk.com

address: 3/f, building-b dongxin science park, honglangbei 2nd road,bao'an district, shenzhen, guangdong, china