Why does Heixiazi Island belong to China and give it to Russia in half?

After the Zhongdong Road incident in 1929, the former Soviet Union occupied Heixiazi Island. In 1954, fishermen in China could not go to the island again. On February 23, 1964, China and the Soviet Union began negotiations on their ownership. However, with the hostility between China and the Soviet Union in 1969, the Soviet Union began to emigrate to the island.

The eastern border of China and Russia is bounded by Wusuli River and Heilongjiang. As the islands such as Zhenbao Island and Heixiazi Island are located on the boundary river, Russia and the Soviet Union have claimed the sovereignty of Zhenbao Island. After the Zhongdong Road incident in 1929, the former Soviet Union occupied Heixiazi Island. After the storm in August at the end of World War II, the Soviet Red Army began to patrol Treasure Island in 1947. During the Sino-Soviet border negotiations in 1964, the Soviet side was prepared to return Treasure Island to China, but the negotiations were suspended due to the deteriorating Sino-Soviet relations. From 1967 to the beginning of 1969, there were constant patrol conflicts between the two sides in several places on the border, such as Qiliqin Island and Zhenbao Island on the Wusuli River, ranging from scolding to shoving and fighting with sticks. Since 1968, China has been preparing to carry out armed operations on the eastern border of China and the Soviet Union. In 1969, with the approval of the Central Committee of the Communist Party of China and Mao Zedong, Chen Xilian, commander of shenyang military area command, deployed a

"self-defense counterattack on Zhenbao Island" in March, setting the tone for the 9th National Congress of the China Communist Party in April. ? On March 2, 1969, when Soviet troops discovered that Chinese people had landed on the island, they sent border patrols to the island to expel each other. They were ambushed by the Chinese, killing and injuring dozens of people. On March 15 and 17, the border guards of China and the Soviet Union clashed again here. Soviet troops used tanks, armored vehicles, planes and then "secret weapons" and "hail" rockets. The PLA used anti-tank guns, recoilless guns, 4 rocket launchers and other light weapons and deep artillery fire on the shore. Both sides claimed that the other side deliberately provoked and fired first. Later, China repelled the other side's attack, and after the battle, China controlled the whole island. In 199, the ownership of Zhenbao Island was resolved, and in 1991, Russia recognized Zhenbao Island as belonging to China. ? In 24, China and Russia also reached an agreement on Heixiazi Island. According to the Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Border signed by China and Russia, Russia will return all the occupied Yinlong Island, part of the territory of Heixiazi Island and most of the territory of Abatutuzhou on the Ergun River near Manzhouli, Inner Mongolia, to China.

in April p>25, the Russian government approved this supplementary agreement. A month earlier, the NPC Standing Committee also adopted a decision on ratifying the Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Border.

At this point, not only the territorial dispute of Heixiazi Island has been settled, but also the 43-kilometer border between China and Russia has been confirmed. In October 28, the Chinese and Russian governments held the unveiling ceremony of the boundary pillar in the eastern part of the Sino-Russian border on Heixiazi Island. About 171 square kilometers of land and its waters on the west side of Heixiazi Island were officially assigned to China.