Disputed areas:

Changbai Mountain Tianchi, Yanbian Autonomous Prefecture in Jilin Province (the so-called "Jiandao"), some islands in the Yalu River and Tumen River.

After the border negotiations between China and North Korea in 1962, Baektu Peak and more than half of Tianchi Lake were assigned to North Korea. Baektu Peak was later renamed General Peak by North Korea

In 1962, the People’s Republic of China and the People’s Republic of China The Chinese government and the Democratic People's Republic of Korea government signed the "China-North Korea Boundary Treaty" in Pyongyang (Zhou Enlai, Kim Il-sung).

The total length of the China-North Korea border is 1,334 kilometers, including 45 kilometers of land boundary and 1,289 kilometers of water boundary. The Liaoning section starts from the mouth of the Hunjiang River at the junction of Liaoning Province and Jilin Province and ends at the mouth of the Yalu River, with a total length of 306 kilometers. After the first joint border inspection between China and North Korea from 1972 to 1975, 61 sandbanks and islands were identified, 13 of which were assigned to China.

Beginning in 1990, China and North Korea conducted the second joint border inspection, and the Liaoning section was put on hold because there were 10 unresolved islands. These 10 islands are:

1. Xiajian Shazhou, 2. Taoli Sandwich Island, 3. Taoli Shangdao (called Jiansang Island in North Korea), 4. Shangsan Island and Xiashima Island, 5 , the outer island of bird's nest, 6. The sandwich in the nest is adhered to the upper part of Beisang Island. The sandwich island covers an area of ??49,058 square meters. The upper expanded part overlaps 930 square meters of North Korea's Beisang Island. It was already bonded during the 1995 flood; 8. East Taiping Island, 9. The lower part of the main island of Chuosang Island has increased, 10. The sub-island of Chuosang Island has increased significantly.

As the two sides prepare to determine the ownership of these 10 issues, the North Korean side pointed out that the emergence of Xia Tsim Shazhou on the Chinese side was because China built a 120-meter dam in Ma Shi Sandwich during the Cultural Revolution, blocking the tributaries of the boundary river. Caused by. Therefore, China had to remove the sandwich dam first, and then consider determining the ownership of Ha Tsim Sha Chau, which resulted in the suspension of the second joint inspection in 1992. Under this circumstance, after negotiation between the joint inspection committees of both sides, starting in 1993, the two provinces and highways held talks on the Macao Sandwich Project. As a result, the second joint inspection of the China-North Korea border has also been put on hold and has not yet been concluded.