China and Tajikistan are two countries that are right next to each other, and they share a border. This border is like a big imaginary line that separates the two countries, kind of like a fence between two neighbors' yards.
Now, when two countries share a border, it's important for them to agree on where exactly the border is, so that people and things can move back and forth between the countries without any problems. However, there can sometimes be disagreements about where the border should be, and that's where things can get complicated.
In the case of China and Tajikistan, there have been some disputes about where exactly their border should be. This is because the border between the two countries was established a long time ago, back when the area was part of the Soviet Union. Since then, the terrain around the border has changed, with rivers shifting and mountains eroding, which has made it harder to determine exactly where the border should be.
To try to solve this problem, China and Tajikistan have been talking to each other and negotiating to come up with a mutually acceptable border. They have also been conducting surveys and mapping the terrain to help them figure out where the border should go.
However, this is all easier said than done, and there are still some disagreements and tensions between the two countries over the border issue. But hopefully, through continued negotiation and cooperation, China and Tajikistan will be able to come to a peaceful and fair resolution that works for both sides.