The Secret History of Mongolia is a historical book that records the formation, development and growth of the Mongolian nation, and it is the earliest extant scroll of Mongolian national history and literature. Since it was written in 1240, it has been read for more than 760 years. It is a book with rich and heavy connotation and full of grassland heroism. It contains a lot of information about the history of social changes, cultural customs, religious beliefs and aesthetic spirit, and preserves myths, legends, religious beliefs and ceremonies, stories, fables, poems, aphorisms and proverbs of Mongolian and Central Asian nationalities. Thus, in an almost encyclopedic way, it has become a peak of human hunting nomadic culture that deserves high attention in the world.
Jianggeer is a heroic epic of Mongolian Urad, which is regarded as one of the three major epics of ethnic minorities in China.
Gestler is a famous epic of Mongolian heroes. It was first born in the Tibetan epic Biography of King Gesar. The main characters of the two epics are basically the same, and the story lines are quite similar. In the long-term spread of different nationalities and regions, they all have their own distinctive national styles and local characteristics, forming two independent works.
The heroic epics Gestler, Jianger and the historical biographical literature The Secret History of Mongolia are also called the three peaks of Mongolian classical literature.
So the first person's statement is correct.