Beijing Zhongkejianye is a hi-technology corporation located in new technology developing district of Zhongguancun in Haidian in Beijing. The company has been specialized in R & amp;D、production、sales、engineering and technical services. 　　 In 2001, the company designed and developed a new generation of central air conditioning equipment characterized by its environmental-friendly and energy-saving features.-- ground source heat pump . 　　 The heat pump has been widely used in hotel, office buildings, shopping malls， hospital and individual homes. Meanwhile, the series products such as heat pump heater and solar power heater are also used widely in building pr