Because the general inferred from the birds' calls that the invaders were near the troops, he quickly ordered the troops to move. This great general is Xu. There are many heroic martyrs, who shed blood and sacrificed, making our life stable now. Their spirit deserves our admiration. Even after many years, their great achievements are still being told by us. Xu is one of these heroes. He was born in the northeast. We all know that Japan's invasion of China began in the northeast, and he was the first person to be hurt by the invaders. The invaders burned, killed and looted, doing all kinds of evil. Xu has suffered a lot, but he knows that more compatriots are suffering. From then on, he was determined to save the country, so he began to join the army. Because he is very brave and resourceful in combat, and he never shouts bitterness and tiredness in training at ordinary times, and he is never afraid of danger when he goes to the battlefield. He was always the first to bear the brunt and was soon elected as the new general by the soldiers in the army. His soldiers also listened to him very much and thought he was a very capable leader. At that time, Xu led a guerrilla war with the invaders, and Xu led a successful bombing of the aggressors' rail transit lines. Everyone is very happy, but at the same time they are organizing a retreat. The retreat route is very long. While they were resting on the road, Xu saw a bird. Seeing the bird, he immediately ordered the troops to act. He is so sensitive because he knows that all the villages in Shili are very short of food, and the birds are basically starved to death, but this bird looks very strong and shows no signs of hunger. Obviously, someone is taking care of the bird. In such a remote area, it is probably the invaders who can take care of this bird. The invaders wanted to find out about them through this bird, so Xu quickly led the troops to evacuate.