Ningbo Sina Air  Co., Ltd  established in 2018, located in Yuyao Ningbo city.which is 2.5h far away from Shanghai Pudong airport. Ningbo Sina Air  Co., Ltd  is a comprehensive manufacture with independent export license. We have strong capability of design, R&D , production and sales team. have cutting- Punching- Bend- welding-powder coating-plastic injection worksh...