Yueqing Zhongshuo Electric Co. Ltd(ZHSO) is a professional manufacturer of ac contactors and situated in western of zhejiang, the upper reaches qiantang river. Quzhou is the political, economic, cultural center and transportation hubs of western zhejiang, known as the " the point of the four province, five road total head", which has always been the previous military strategists battle ground. The CJX1 (3TB40-44, 3TF30-57) series, CJX2 (LC1, LC1-F), CJX8 (B) series of AC contactor, CJ19 series of transfer capacitance relay and JZC1, JZCIF (3TH) series of contactors have passed the regular inspection and supervision of the provincial level over the years. Products have received production permit and have been CCC, ISO9001:2000 certified. The performance reaches the advanced level of domestic and foreign similar products for they are manufactured strictly in standard.