Core Point - The maintenance staff at Xining Caojiabao International Airport in Qinghai is conducting seasonal equipment maintenance to ensure flight safety and efficient operation of the high-altitude airport during the winter flight season [1][3][5][7][9][11] Group 1 - The maintenance activities include checking aircraft engines, windshields, and connecting ground power [1][3][5][9] - The team is focused on ensuring the safety of flight operations and the effective functioning of the airport [1][3][5][7][11] - Maintenance personnel are also involved in directing aircraft safely into position on the ground [7][9][11]