The history of Qidan is actually very long. They existed in the Tang Dynasty, and they were very powerful in the early Tang Dynasty. Therefore, Qidan bowed and paid tribute to the Tang Dynasty every year. However, at the end of the Tang Dynasty, due to the decline of the national strength of the Tang Dynasty, the Khitan slowly fell into the arms of the Turks. After the demise of the Tang Dynasty, the Khitan only came to talk about the development period.
In the Song Dynasty, there were actually many countries in the Central Plains, but in the Song Dynasty, the Khitans established a country, namely Liao State, and together with Jin State, almost formed a tripartite confrontation. Everyone knows the story of Yang Jiajiang, right? The enemy against which Yang Jiajiang fought was Liao, that is, the Khitan. In fact, the Khitan was really powerful at that time and almost unified the whole country.
However, once the tide turns, no matter how powerful the country is, it will eventually perish. In the late Liao Dynasty, their emperor was incompetent and a powerful country slowly declined. Some of them also rebelled. These people are Jurchen, who gradually gained the upper hand in the war with Liao. Finally, one day, they defeated Liao, which was divided and could no longer be a climate.
But even so, some of them escaped, thinking that they would be brilliant again one day, but it backfired. It's time for the Mongols to rise. They established the Yuan Dynasty. This time, by the way, a small number of people were destroyed, so Qidan disappeared in the long river of history. But it can also be considered that women are really descendants of the Khitans.