The Rouran was an ancient nomadic nation, with its history dating back to the 3rd century AD. In the northern China at that time, the Rouran was a powerful country, with its territory covering today's Mongolia, northeastern China, and the Far East of Russia. However, with the passage of time, the Rouran gradually declined and was eventually conquered by other ethnic groups.

The last ruler of the Rouran was Tuoba Gui, who was the founding emperor of the Northern Wei Dynasty. In 420, Tuoba Gui launched a war against the Rouran and finally captured its capital, Fuluoshan, in 439, ending the history of the Rouran.

The Northern Wei Dynasty was an important dynasty in Chinese history, and its establishment marked the beginning of the North and South Dynasties period. The establishment of the Northern Wei Dynasty was led by the Xianbei people, while the Rouran was established by one of the ancestors of the Xianbei people - the Tuoba tribe. Therefore, the destruction of the Rouran by the Northern Wei Dynasty can also be regarded as the annihilation of a country founded by their own ancestor.

Apart from the Northern Wei Dynasty, the Rouran was also conquered by other ethnic groups. For instance, in the early 5th century, the Rouran was conquered by the Turks; and in the early 7th century, it was conquered by the Tang Dynasty. However, these conquests did not change the historical status of the Rouran as an independent country.

In conclusion, the Rouran nation was destroyed by the Northern Wei Dynasty. The Northern Wei Dynasty was an important dynasty in Chinese history, and its establishment marked the beginning of the North and South Dynasties period. Although the Northern Wei Dynasty destroyed the Rouran, it did not change the historical status of the Rouran as an independent country.

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