Publishing the history of the first four khans from the house of Genghis, I consider it necessary to place here some explanations, without which she, according to the news of her subjects and in the image of its compilation, may not seem entirely intelligible to the reader. This story is not a translation of any special book, but is extracted from two Chinese works, namely, from Genghis's own history of the house that reigned in China under the name Yuan, and from the Chinese general history called "Thong-jian-gang-mu." The first of them serves as the basis for the book I am publishing, and from the second some details are borrowed related to the explanation of what is already said in the first.