The significance of that bullet is loyalty to the motherland, national security, prevention of information leakage, responsibility entrusted by the people, safety of people's lives and property and safety of comrades-in-arms. This is the mission of the last bullet, and it is also the mission of being a soldier of China People's Liberation Army. Of course, most people now think this is a stupid behavior. But as a soldier and a man, don't forget that behind you is your motherland, your relatives and everyone you care about. As a soldier, as a China person, as a husband, as a son, this is a life-and-death choice. This is reflected in Liu Meng's other three books related to it.