The Zhenbaodao incident refers to the serious border armed conflict between China and the Soviet Union in Zhenbaodao, Heilongjiang Province in March 1969. Treasure Island is located in Hulin County, Heilongjiang Province. It is on the China side of the center line of the main channel of the Wusuli River on the Sino-Soviet border. Together with the nearby Caneque Island and Qiliqin Island, it has always belonged to China. Since the 1960s, with the continuous deterioration of Sino-Soviet relations, the border guards of the two countries have been constantly rubbing against each other in Zhenbao Island and escalating. On March 2, 1969, more than 70 Soviet border guards, two armored vehicles, a truck and a command vehicle invaded Zhenbao Island, killing and injuring many China border guards. Our island patrol was forced to fight back in self-defense and fought fiercely for an hour, inflicting heavy losses on the invaders. After March 4, Soviet border guards and planes invaded Zhenbao Island again. On March 15, the Soviet Union dispatched more than 200 infantry, more than 20 tanks and more than 30 armored vehicles. Under the cover of aircraft, it launched three consecutive attacks on China soldiers and civilians guarding the island. Our country's commanders and soldiers guarding the island, the militia and the masses cooperated closely and fought hard for 9 hours, repelling the Soviet attack. On March 17, the Soviet Union dispatched 100 infantry and 3 tanks, and once again landed on the island to attack China crazily. Our border guards rose to defend themselves and fought back with heavy artillery fire. China's Ministry of Foreign Affairs protested strongly to the Soviet government three times. This border armed conflict once brought China and the Soviet Union to the brink of war. Subsequently, in Tielekeqin area of Xinjiang, a larger-scale armed conflict occurred between China and the Soviet Union. Since then, the Soviet military once made a plan to launch a nuclear strike against China. The armed conflict between China and the Soviet Union intensified China's estimation of the inevitable "Left" in the world war. Preparing for a big battle and preparing for war in an all-round way has become an important guiding ideology of the Ninth National Congress of the Communist Party of China held in April. 1September 1969 1 1 day, Premier Zhou Enlai held frank talks with kosygin, chairman of the Soviet Council of Ministers who returned from Hanoi to attend Ho Chi Minh's funeral and passed through Beijing. 10/0 On October 20th, after the Sino-Soviet border talks were held in Beijing, the Sino-Soviet border conflict began to ease.