Guizhou Changzheng Tiancheng Holding Co.,Ltd. engages in the research, development, manufacture, sale, and service of transformer on load tap-changers and off-circuit tap-changers in China. It also provides motor driver mechanism products, intelligent controllers, and oil filters, as well as pre-sale, consultation, rapid response, and after-sale services. The company's products are used in electric power, petroleum, chemical, metallurgy, railway, light, and real estate industries. It also exports its products to approximately 30 countries and regions. The company is based in Zunyi, China.