CHYY Development Group Limited, an investment holding company, engages in the research and development of geothermal energy as alternative energy for building heating applications in Mainland China. The company operates through four segments: Shallow Geothermal Energy, Air Conditioning/Shallow Geothermal Heat Pump, Property Investment and Development, and Securities Investment and Trading. The Shallow Geothermal Energy segment is involved in the provision, installation, and maintenance of shallow geothermal energy utilization systems.