For departure halls of airport and waiting halls of stations, we recommend the use of semi-centralized air-conditioning systems; for large-space public area, we recommend the use of modular air-handling unit/rooftop air-conditioning unit; for small-space areas, we recommend the use of Fan coil unit + Ceiling-mounted fresh air handling unit systems and the air-conditioning host equipment uses air-cooled screw heat pump or centrifugal chiller.