The balance of the aircraft is the center of gravity of the aircraft, which is extremely important to the stability, controllability and safety of the aircraft. Keeping the plane balanced in the air is operated by the balancer. Before each flight takes off, the ground balance loading department will calculate the balance parameters of the aircraft according to the number of passengers, the weight of loaded goods and the flight seats selected by passengers when checking in, and the flight personnel will fly according to the relevant balance parameters. -Basic knowledge articles.