Sun Tzu advocated "being prepared for danger in times of peace" and "relying on me not to come, relying on me to wait, relying on me not to attack, relying on me not to attack" ("Nine Changes")

Therefore, the general rule of leading troops to fight is: don't expect the enemy not to attack us by luck, but rely on yourself to make full preparations for the enemy at any time; Don't expect the enemy not to attack me by luck, but by having strong strength to keep the enemy from attacking me.

If you don't rely on it, you will rely on us. Don't expect the enemy to get away with not attacking me, but make full preparations for dealing with the enemy at any time on your own.