In 1997, Zigong Tongda Machinery Manufacturing Co., ltd. was established and held by Zigong High Pressure Vessel Works (now the Zigong Daye High Pressure Vessel Works).
Zigong Daye High Pressure Vessel Co., Ltd. has been in rich experience of design andmanufacture L type high pressure gas compressor more than 30 years. In 1991, the first L type natural gas compressor was taken the lead in entering into CNG market in China. It is the pioneer for CNG vehicle application development in China