**: Tujun has something to say.
Historical Background and Territorial Cession
The Sino-Russian border, which spans the distant forests and snowfields, is not only the intersection of two ancient civilizations, but also a witness to a rich history.
The more than 4,500-kilometre-long border, which stretches across the northern edge of the Asian continent, has witnessed the ups and downs of the history of the two countries. This border is not only a geographical demarcation, but also an important thread of cultural, political and military strategy, and its changes reflect the confrontation and negotiation of international powers.
As the saying goes, "A country without borders cannot stand, and a home without fences is uneasy." "The establishment of borders is essential for safeguarding national sovereignty and territorial integrity. However, during the Qing Dynasty, China was facing both domestic and foreign challenges. The smoke of the Opium War has not yet dissipated, the banner of the Taiping Heavenly Kingdom has been raised in the interior again, and the land of China is full of war and bloody rain.
The weakening of national strength made the Qing ** retreat step by step in the diplomatic arena, and finally had to sign a series of treaties on land cession and reparations under unequal pressure. In the history of Sino-Russian relations, there are several unequal treaties that are particularly memorable. The Treaty of Aihun (1858), the Treaty of Peking (1860), and the Sino-Russian Treaty of Nebuchu (1689) constitute the dark strokes of this period of history.
Under these treaties, large swaths of northeastern China—including present-day Outer Northeast—were ceded to the Tsar**. Every inch of land lost is a loss of national dignity and a wound to the soul of the nation.
The mountains and rivers are broken and the wind is fluttering, and the life experience is ups and downs. This poem by Qing Dynasty poet Wen Tianxiang also seems to convey the helplessness and grief of the Chinese in that period of history.
The cession of territory is not just a simple change of color on the map, but also means that the fate of millions of people is rewritten. Since then, the importance of defending national borders has been deeply imprinted in the hearts of every Chinese.
The territory of China returned by Russia.
With the collapse of the Soviet Union, the world political landscape was turned upside down like an icebreaker, and a new world unfolded in the East. Against this backdrop, China and Russia have launched a new round of border negotiations, which is not only a review of historical scars, but also a repositioning of the two great powers in the context of the new era. As the saying goes, "A good start is half the battle." "The beginning of the Sino-Russian border negotiations heralds a new chapter in the relations between the two countries.
At the time of the collapse of the USSR in 1991, a new Russian Federation stood in the east of the world. At the same time, China is moving towards the path of reform and opening up, and both countries urgently need to establish a solid relationship in the new international environment.
The border issue, a knot left over from history, has become the first knot that the two sides need to untie. After a series of diplomatic efforts and friendly consultations, Russia decided to return part of its territory to China, which can be described as an unusual move in the history of international relations. 
Every inch of these returned lands contains a deep meaning. Although the area of nine square kilometers in northeastern Siberia is not large, it is like an important chess piece, representing a new harmony and balance in Sino-Russian relations.
Subsequently, the return of five square kilometers of land in the Far East was like a trickle into the Yangtze River, which was a precious step towards returning to its homeland. The 10 square kilometers of the Dongsang border area, although small but fine, symbolizes peace and friendship on the border between the two countries. The return of about 173 square kilometers of land on Black Blind Island is like a major reconciliation song, making up for the shortcomings of history and laying the cornerstone for future cooperation.
In the process of the gradual return of these territories, we have seen not only an increase in land area, but also a deepening of mutual trust and harmony between the two countries. As the old Chinese saying goes: "The grace of a drop of water is reciprocated by a spring." "This series of actions by Russia is undoubtedly a friendly response to China and a kind of respect for history. In the tide of international politics, such a move is particularly valuable.
The significance of the return of land.
The significance of the return of land is far-reaching and complex, it is not just a change of color on a few maps, but a solid declaration of national sovereignty and territorial integrity. 
There is no way out of the mountains and rivers, and the willows and flowers are bright and another village. Just as the scene depicted in this ancient poem, after a long diplomatic twist and turn, it finally ushered in the dawn of territorial return, bringing new hope and possibility.
The return of territory symbolizes the reaffirmation of national sovereignty. The return of every inch of land is a reshaping of the dignity of the country again and again, and a great improvement of the national self-esteem. On the international stage, this has not only improved China's status, but also added luster to China's international image. As the saying goes, "Home and everything prospers." "The territorial integrity of a country is the cornerstone of national harmony and prosperity.
At the same time, the return of the territory has also injected new impetus into regional stability and development. Every peaceful change of territory is the embodiment of the concept of peaceful development and the best proof of mutual respect and peaceful coexistence between countries. It not only mends the rift in history, but also paves the way for future cooperation and win-win results. Behind the return of these pieces of land is the best interpretation of "the state is not proud of the breadth and narrowness of the land, but proud of the justice of governance".
Every inch of the country embodies the deep affection of history, and every return of territory reaffirms the sanctity of sovereignty and shows the self-confidence and firmness of the country. 
This is not only a review of the past, but also a vision and planning for the future, injecting a more solid foundation for the country's tomorrow.