The second question: Yang Liwei's position in the army determines it. Yang Liwei is the deputy director of the Astronaut Training Center of the General Armament Department. Astronaut training center is a military unit, which belongs to the General Armament Department. The convention was to pass on military uniforms, so he changed them. It turns out that he is an air force pilot! Just like changing units, the new units belong to the army. You got it?