The little donkey stole a gun from the Su Jun warehouse, trying to cross the river and return to China to find his brother Erluzi, and fought the Japanese with Erluzi, but he fainted halfway through the way. Thanks to the nearby villagers who rescued him, his gun fell into the river and disappeared. The little donkey was sentenced to death for defection. Lu Changshan took the initiative to bear the blame for him and was locked up.

Wan Fuqing, Gao Yunhu and others searched in the river for a whole day and finally found the missing gun of Erluzi. Instructor Wang negotiated with the Soviet Union, Erluzi and Lu Changshan were released. Instructor Wang told Xiaoluzi the news of Erluzi's death. Xiaoluzi fainted on the spot because of his agitatedness.

Half a year ago, Erluzi was ordered to go back to Datuziling to rescue the detained Anti-Japanese Allied Forces soldiers, but was ambushed by the Japanese. The soldiers in their group were arrested. The Japanese took them to the village and sawed off one of the soldiers' legs in front of the people of the village, forcing the people to report the whereabouts of the Anti-Japanese Allied Forces. Erluzi did not want to implicate the people and admitted that he was from the Anti-Japanese Allied Forces. This time, in order to carry out a secret mission, he thought the Japanese wanted a pistol, shot all the arrested soldiers, and finally shot himself.

The leader of another group brought back Erluzi's relics. The little donkey built a tomb for Erluzi and buried the canned meat that Erluzi wouldn't want to eat. The little donkey was sad and in pain. He stood by the river and shouted loudly to the other side, hoping that the dead brother would show the second brother who was far away in a foreign country to go home.

In 1941, in the process of attacking the Anti-Japanese Allied Forces, in order to prevent the smoke from burning trees from exposing the number and location of the army, the puppet government asked the puppet government to provide 500,000 tons of charcoal. The puppet government replaced the heavy shackles to impose the heavy shackles on the people, and the already overwhelmed people of Northeast China made even worse.

Tang Deyuan was recuperating at home for half a year, and his health gradually recovered. Tang Deyuan woke up in a daze early in the morning and found that his parents were not at home. He saw the Japanese army escorting the people through the door through the window, and he came out to see what was going on. Suddenly, he heard a good news broadcast on the Japanese radio that the Kwantung Army wiped out all the Anti-Japanese United Army within the Sanjiang Plain.

When the Japanese army saw him standing at the door empty-handed and forced him to hand over the charcoal, the village chief hurriedly stood up and explained that Tang Deyuan was still sick. The Japanese army did not believe it at all, and mistakenly thought he was pretending to be lazy, so he caught him.The village chief handed over the letter of proof written by Xiao Tielin to the Japanese squad leader before rescued Tang Deyuan.Tang Deyuan felt very uncomfortable when he saw the Japanese army chaotic and killing innocent people.

Instructor Wang told Lu Changshan the news of Zhao Youwang's death. In order to cover up his comrades, Zhao Youwang was shot and injured, and before his death, he asked his comrades to pass a message to Lu Changshan. He did not find Tian Xiaogui and Tang Deyuan. The little white horse and orchid were both sacrificed, and Lu Changshan was very sad.The Japanese army sent Chief Ma Baochang to make a lot of money in the village. The people dared not speak out, so they could only hand over it obediently. Tian Xiaogui escaped from his home and he worked as a long-term worker at Chief Ma Baochang's house.

Chief Ma took Tian Xiaogui to go up the mountain to hunt. Tian Xiaogui's shooting skills were accurate. Chief Ma was suspicious of his identity and asked him to shoot another shot. Tian Xiaogui deliberately missed.Chief Ma suspected that Tian Xiaogui was the Anti-Japanese Allied Forces, so he took people to arrest him. Tian Xiaogui heard the news in advance and hid it, and then took advantage of the chaos to escape to the mountains.

On August 1, 1942, the Northeast Anti-Japanese Allied Forces Education Brigade was officially established, Zhou Baozhong was appointed as the brigade commander, and Li Zhaolin was appointed as the political commissar. The teaching brigade was temporarily managed by the Soviet Workers and Peasants Red Army Headquarters, and accepted the official number of the 88th Independent Infantry Brigade of the Red Army, and the external number was Unit 8461.

In addition to participating in military training in daily life, Lu Changshan and the soldiers also learned a lot of combat theories, Russian and newspapers. They received an important task, which was to learn parachuting at high altitudes and then return to China to fight against Japan.Lu Changshan and the soldiers conducted systematic learning and quickly mastered the technology of skydiving at high altitudes.

In 1943, coach Liao Sha led Lu Changshan, Wan Fuqing and others to conduct the first parachuting training. Wan Fuqing was about to get on the plane, but Li Zhenghao called him. The two of them were so excited that they hadn't seen each other for a long time. They didn't care about reminiscing about the past and each got on the plane for training.The plane flew to one thousand meters, and Liao Sha asked Lu Changshan and the others to line up to jump. Lu Changshan was very nervous. Wan Fuqing cheered him up, and they jumped down one by one.

After Tang Deyuan recovered from illness, he came to Mudanjiang to surrender to Xiao Tielin. Xiao Tielin entrusted him with important tasks. Tang Deyuan accidentally found that Xiao Tielin was carrying opium in the food, so he came to Xiao Tielin to settle the score. He did not allow him to do anything harming the world. Xiao Tielin was in Mudanjiang and he just wanted to seek some benefits for his brothers, and advised Tang Deyuan to think about it.