Windbell is a well known company in the retail petroleum equipment industry in China.Windbell has three holding companies, whichare Beijing Sanki Petroleum Technology Company, Beijing Beifang Windbell company and Zhengzhou Yunfeiyang information technology company.The main products of windbell and its holding companies focus on gas station, vapor recovery and safety monitoring. Auto Tank Gauges(ATGs) is one main product of Zhengzhou Windbell Company.As one of leading manufacturer of ATGs in China, Windbell acquired various patents on ATGs and significant market success in the past years. Currently, Windbell ATGs has been installed over 20 provinces all over the nation under various enviroment conditions from extra low temperature to high temperature. The performance has been widely accepted by the retail customers.