Business content：Mid‑deep dual‑temperature ground‑source heat‑pump system for winter heating, summer cooling and domestic hot‑water supply. Hold 35 relevant patents with “heat‑extraction without water‑intake” process. 

Main fields：Heating & cooling for large public buildings, hotels, hospitals, schools and commercial complexes. 

Typical projects：Beijing Friendship Hotel ground‑source heat‑pump project; Tianjin National Convention and Exhibition Center Phase‑II ground‑source heat‑pump project.