CHYY Development Group Ltd. is an investment holding company, which engages in the research, development, and promotion of geothermal energy. The company employs 181 full-time employees The company went IPO on 2001-11-30. The firm operates through four business segments. The Shallow Ground Source Energy segment is engaged in the provision, installation and maintenance of shallow ground source energy utilization system. The Properties Investment and Development segment is engaged in the investment in properties for its potential rental income. The Air Conditioning and Shallow Geothermal Heat Pump segment is engaged in trading of air conditioning and shallow geothermal heat pump products. The Securities Investment and Trading segment is engaged in trading securities and other types of investment.