Mr CHUNG Kim-chuen says that enhancement or conversion works include adjustment of central air-cooling systems and primary air handling units, addition of exhaust air fans, disinfection, filters and air purification equipment.

Mr CHUNG Kim-chuen says that enhancement or conversion works include adjustment of central air-cooling systems and primary air handling units, addition of exhaust air fans, disinfection, filters and air purification equipment.

Mr CHUNG Kim-chuen says that enhancement or conversion works include adjustment of central air-cooling systems and primary air handling units, addition of exhaust air fans, disinfection, filters and air purification equipment.