Where was the second season of Real Men filmed? Why are there many mosaics?

The shooting location of the second season of Real Men is mostly the military camp, and the location of the military camp is generally kept secret.

Most people who make mosaics are photographers, and they are vaguely seen holding cameras. If they don't play, they will feel disobedient. Some of the staff of the program group accidentally entered the camera, and some wore armbands to prevent leaks. In addition, the number of the fighter plane should be mosaic, because it shows the unit to which the plane belongs, and the number of the air force seems to have not been made public, so the mosaic is still very important.