Recorded in the classic, which was compiled in Chinese characters in March 1675, are the 1 205- year-long history of Tangun Korea through 47 kings, folk views on history, nature and universe and other valuable data.

It, with the main stress on the history of Ancient Korea, also gives an explanation of the previous era along with opinions of its author.

Having seen the light as late as the beginning of the 20th century owing to destructive and predatory acts of foreign aggressors, it has been used in the study of history, particularly the history of Ancient Korea.