Zhongshan Yongning Ventilation System Manufacture Co., Ltd. is a large enterprise specializing in producing "yonghua" brand ventilation equipments. Based on the corporate spirit of unify and innovation for greater success, our company has achieved big development through twenty years of efforts. Now our company occupies a floor space of over 36,000 square meters and a factory building area of over 23,000 square meters. We are located in Chinese famous Star Town---- Xiaolan Town, Zhongshan, ...