Greka Engineering & Technology Limited, an investment holding company, engages in the engineering, procurement, construction, and management of infrastructure projects in the unconventional gas sector in China. It operates through two segments, Gas Equipment Sales and Infrastructure Services. The company is involved in the design, construction, and management of gas gathering systems; pipeline construction; installation and maintenance of CNG compressing integrated production facilities; installation and commissioning of gas-fired power facilities; and construction of CNG retail stations. It also engages in the research, development, and delivery of technologies specific to the unconventional gas sector; and incorporation of such technologies into industry-specific hardware manufactured in-house, such as well-head and gas gathering system compressors, CNG and liquefied natural gas dispensers, integrated circuit card point of sale gas station systems, and supervisory control and data acquisition systems used for remote supervision and management of drilling operations, gas gathering systems, power facilities, vehicles, and retail gas stations. In addition, the company is involved in the supply and distribution of gas control systems and equipment, as well as provision of infrastructure services. Greka Engineering & Technology Limited was incorporated in 2013 and is headquartered in Zhengzhou, China. As of December 31, 2015, Greka Engineering & Technology Limited operates as a subsidiary of Green Dragon Gas Holdings Limited.