CHYY Development Group Limited is an investment holding company focused on the research, development, and promotion of shallow geothermal energy as an alternative clean heating and cooling source for buildings in Mainland China. The company offers a fully integrated industrial chain, including technology R&D, design consultancy, equipment manufacturing, system engineering, and property maintenance, across segments like Shallow Geothermal Energy and Air Conditioning/Shallow Geothermal Heat Pump. It was incorporated in 1999 and is headquartered in Central, Hong Kong.