The air force is responsible for combat readiness duty, air patrol and other tasks all the year round, with tens of thousands of combat takeoffs every year. Near the Spring Festival, we came to a brigade of air force aviation in the Eastern Warfare Zone, which is located in the East China Sea. Almost every day, the battle alarm sounded, and the pilots were ready to take off at any time, faithfully guarding the territorial waters and airspace of the motherland.