On December 29, 2012, a mission for urgently sending a climber of Yuan Peak, Yu Mountain to hospital. A HK climber was attacked by mountain sickness and pulmonary edema simultaneously. Type B234(NA-602) from Group 1 of the 3rd Service Battalion was dispatched to perform the medical evacuation mission. With high and precious trees on the Yuan Peak of Yu Mountain, the flight could not land for rescue. Aloft hanging was carried out and the climber was sent to hospital successfully. Mission Completed.