Countries that China and Russia have not recognized so far can participate in the Olympic Games but not the United Nations.

There is a special area in the southeastern Balkans, about ten thousand square kilometers in area, surrounded by Serbia, Macedonia, Albania and Montenegro, this is Kosovo.

Kosovo is a region of mixed religious and ethnic issues. Although it is part of Serbia, it unilaterally declared independence in 2008, which has been recognized by some Western countries and the United States, but many others have reservations.

In the history of the Balkan Peninsula, due to ethnic conflicts, territorial disputes and great power game, it has long been troubled by large and small wars.

The region is geographically unique and directly connected to three continents, so it is strategically important for any surrounding power. It can serve both as a platform for expanding territory and spheres of influence, and as a strategic buffer against pressure from other powers.

Kosovo is located in the southwest of the Balkan Peninsula, although the region is not large, because of its complex religious and ethnic composition, as well as escalating ethnic contradictions, often become the fuse of war, is the real focus of war in the Balkans.

In 1929, Albanians made up about 40% of Kosovo's population. Subsequently, due to the continuation of the war, Serbs continued to leave Kosovo, resulting in a decrease in the population and the proportion continued to decline.

To look at Kosovo's history objectively, one can compare its relationship with Serbia to that of an entangled couple.

However, Albania's involvement caused a rift in the relationship, and at the same time, the seeds of independence were sprouted in Kosovo.

During World War II, Communist-led guerrillas from Yugoslavia (of which Serbia was a part) and Albania fought over the ownership of Kosovo, sparking ongoing disputes and disputes.

In November 1944, the Yugoslav People's Liberation Army liberated Kosovo and made it nominally part of Serbia. In the following years, however, Albanian insurgents established a military government in Kosovo and attempted to incorporate it into Albania.

The move triggered fierce fighting between Yugoslav and Albanian forces, and eventually Serbia regained control of Kosovo.

In July 1945, the People's Assembly of Kosovo decided to formally integrate it into the Republic of Serbia, after which Kosovo was defined as an autonomous province of the Republic of Serbia, but remained under the jurisdiction of Serbian territory.

The dispute over Kosovo's sovereignty was temporarily settled, but the Albanians continued to make "small moves" during the war to try to divide Kosovo and aggravate ethnic tensions.

Serbia resorted to violent measures to suppress the "dishonest Albanians", which led to more violence and the intensification of ethnic tensions.

Sovereignty disputes, social unrest, and ongoing wars have left Kosovo in a difficult situation, making it one of the poorest parts of Yugoslavia.

The large Albanian population, with a higher birth rate than Serbs, has exacerbated poverty in Kosovo.

Albanians gradually became the dominant population of Kosovo, while Serbs made up a smaller proportion, leading to a weakening of the "blood relationship" between Kosovo and Serbia.

Kosovo is keen to get rid of its nominal "home", but Serbia insists it is an integral part of it.

Kosovo, however, seems determined to become independent. As time went on, the conflict over independence became a headache for Serbia.

In May 1980, after the death of Tito, the authoritative leader of Yugoslavia, the alliance between the Yugoslav republics began to falter, and the trend of fragmentation intensified.

The social situation in Kosovo also became unstable, and Albanian university students in Pristina even staged demonstrations demanding the creation of an independent Kosovo

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On March 2, 1989, Serbia announced that it had taken back some legislative, administrative and judicial powers from the autonomous Province of Kosovo. The loss of "freedom" in Kosovo triggered a massive uprising

The protest ended in the death of several protesters and police officers.

The flames of Kosovo's independence flared as the Albanians tried to establish their own independent republic of Kosovo.

They held elections, elected a "president," and established various public institutions.

The dissolution of the Yugoslav federation provided an opportunity for Kosovo's independence, and the Albanians became more active in seeking international support and recognition, even the Kosovo Liberation Army directly demanded independence.

These actions caused resentment in Serbia.

In 1998, Serbia launched a military operation against Kosovo, suppressing independence supporters and even massacred local civilians in order to consolidate its sovereignty in Kosovo.

The incident caused more than 800,000 ethnic Albanians in Kosovo to flee.

The events in Kosovo began to affect the international situation, and the United Nations and NATO began negotiations with Serbia over Kosovo.

They wanted to restore Kosovo's autonomy without sacrificing its independence, but Serbia did not agree and stepped up its military campaign.

NATO's dissatisfaction with Serbia's attitude eventually led to the outbreak of war.

On March 24, 1999, NATO began bombing Serbia, and the war lasted nearly three months, causing the destruction of hundreds of thousands of Albanian and Serb families.

In the end, Serbia relented and signed a peace agreement that gave the United Nations control over Kosovo.

Kosovo remains nominally part of Serbia, but in practice enjoys a high degree of autonomy, including all legislative, executive and judicial administration powers.

As time went on, Kosovo moved closer to independence.

Finally, after decades of turmoil, Kosovo succeeded in gaining independence from Serbia.

On February 17, 2008, Kosovo Prime Minister Hasin Thaci held a special session of the Parliament and read the "Declaration of Independence", declaring Kosovo's independence from Serbia and becoming an "independent, sovereign and democratic state".

The parliament adopted Kosovo's declaration of independence and established Pristina as its capital.

After Kosovo declared independence, countries such as Britain, France and the United States quickly recognized Kosovo's status and established diplomatic relations with it, but Serbia has resisted.

Serbia considers Kosovo to be part of its territory and is not willing to give it up.

In its advisory opinion on Kosovo on 22 July 2010, the International Court of Justice held that Kosovo's declaration of independence on 17 February 2008 was "not contrary to international law".

Although Kosovo has gained partial international recognition, Serbia has maintained its sovereignty over it and has adopted a policy of downgrading diplomatic relations with all countries that have "diplomatic relations" with Kosovo.

At present, more than 100 countries in the world recognize Kosovo's independence, but more than 90 countries, including China and Russia, do not.

Because of opposition from countries such as China and Russia, Kosovo has not been able to join the United Nations as an independent country, although it has been recognized by a majority of countries and has even been able to compete in the Olympics.

Despite its declaration of independence, Kosovo has yet to gain real independence and remains an "illegitimate independence" that has not been recognized by the former sovereign State.

Breakaway independence has bad consequences for other countries, because recognizing Kosovo's independence could lead to more of the same.