What is the reason why Xiao Gazi decided to be the Eighth Route Army?

During the period of War of Resistance against Japanese Aggression, there was a boy named Zhang Ga in Baiyangdian, central Hebei. He is clever and brave, and is nicknamed "Ga Kid". He also has a partner, Eiko, chubby Le Tong. In a Japanese raid, grandma was killed by the Japanese to cover the Eighth Route Army. Zhong, the reconnaissance company commander of the Eighth Route Army, was also captured by the devils. Gazi was heartbroken. Determined to take revenge, he resolutely set out to find a regional team to fight the devils. On the way, he mistook guerrilla platoon leader Luo Jinbao for a traitor and tried to hand over his gun, making a joke. Later, Ga Xiaozi, as big as a child, disguised himself as a watermelon vendor and paid the fat translator with a wooden gun. In order not to let the captain take the gun back, he got angry and hid in the old man's nest, so he was criticized and closed. After the education of the district captain, Gazi realized his mistake. He was injured in a battle and recuperated in his hometown. When the guerrillas attacked the enemy sentry box, he secretly ran back from his hometown to fight in the war, but unfortunately he was caught when he went into town for reconnaissance. Facing the enemy, Gazi was unyielding and escaped in the battle. He cooperated with the guerrillas to pull out the watchtower and rescued Zhong Liang. The battle was won, and the district captain praised Gazi on behalf of the troops and rewarded him with a real small pistol. Gazi was so happy that he finally became an excellent boy scout. Finally, Gazi's hometown was liberated!