This story takes place in 1259 AD. After the fourth Mongolian Khan Meng Ge suddenly died on the Diaoyu Mountains on the front line of the Southern Song Dynasty, Kublai Khan, as the emperor's younger brother, suddenly had the opportunity and threat to compete for the throne of the Great Khan. Although his grandfather Genghis Khan established the ancestral system of electing the Great Khan through the Kulitai Conference during his lifetime, the expansion of Mongolia inevitably produced many generals. These powerful figures all coveted the position of the Khan. The third Guyu and the fourth Mengge both experienced a lot of competition before the new Great Khan was born. Kublai Khan not only had to defeat his competitors militarily and ascend to the throne of Great Khan, but also had to achieve unparalleled achievements and create wealth to bring prosperity and stability to the Mongolian community before he could be recognized as the sole ruler. Because of this, Kublai Khan must conquer the Southern Song Dynasty. This was because the Southern Song Dynasty had the largest wealth and population in Eurasia at that time, even though the campaign to conquer the Song Dynasty had just lost a great khan! Kublai Khan's challenge here is not only to overcome the "blank barrier" and "water barrier" of the natural terrain in order to defeat the Southern Song Dynasty militarily, but also to minimize the damage to both sides in the process, in order to achieve the goal of smoothly receiving the wealth of Jiangnan!
Concept: time travel, history, economy, finance, war