In the middle and late of the last century, Vietnam, which had been good friends with China, changed its appearance after Lê Duần came to power and began to move towards the road of expansion. With the tacit support of the Soviet Union, Vietnam raided and occupied Cambodia, Lê Thanh hyped up anti-Chinese propaganda in Vietnam, and many Chinese expatriates suffered greatly. After repeated warnings were ineffective, the central government decided to send troops to Vietnam to strike at deterrence. In February 1979, the Chinese People's Liberation Army, led by two generals Xu Shiyou and Yang Dezhi, entered Vietnam in two ways, defeated the Vietnamese army in a month, and captured all the towns in northern Vietnam.
In this war, countless warriors have defended the national prestige with their lives and blood, but there are also some traitors who betray the motherland. Born in Guangxi, Zhang Donglin often traveled between China and Vietnam before the war, was familiar with the local terrain, and was proficient in the Vietnamese language. After the war broke out, he worked as an interpreter near a PLA battalion commander. By assisting the People's Liberation Army, he became a great hero in the hearts of the local people. However, after entering the Vietnam war, seeing the vietnamese propaganda leaflet confusing the People's Liberation Army, he was deeply attracted by the conditions set out above, and greed arose. Finally, on a march he secretly surrendered to the enemy and became a traitor.
Because he had worked as an interpreter for the People's Liberation Army, he knew some of the secret information of the troops, and he was already familiar with the local terrain, so the traitor became an assistant to the Vietnamese army, causing great casualties and losses to the PLA soldiers. After the war, he had no use value, so he was sent back to China as a prisoner of war by the Vietnamese government, and his relatives and friends drew a line with him, and the military court also pronounced a death sentence on him. Eventually in prison he could not bear the condemnation of the spirit and died of depression. This sinful traitor finally got the end he deserved.