Beijing Zhengtong Yuanheng Technology Co., Ltd. was established in 2001 and is a technology service company that operates scientific testing instruments and equipment from Europe, America, Japan, and other countries, as well as introduces foreign technology into the domestic market.    The company conducts its business operations with a respected, professional manner.HonOPROF comes from our philosophy---- doing business in an HonOurable and PROFessional way）。 ...