Yuyao Xingxin Plastics Manufacturer is an ISO 9001: 2008 certified manufactory specializing in custom injection molded plastic parts with our own tooling shop. We are located in Yuyao, Ningbo, Zhejiang Province, the "China Plastic City". One hour from Hangzhou airport. Sinye Plastics is a fast growing injection molding manufactory producing custom plastic parts for machining parts, housewares, electronics, consumer goods etc. Processes covers thermoplastic injection molding, insert molding, overmolding and ...