The Legend of Kublai Khan Guoqiang, Gao Fa, Steven Ma and Ray Lui as part of the supporting cast. The series, spanning over 70 years, romanticises the life of Kublai Khan and the events leading to the founding of the Mongol-led Yuan dynasty in China. Kublai was born in 1215 as a son of Tolui, the fourth son of Genghis Khan. At the time, Töregene, the wife of Ögedei (Genghis Khan's third son), sees Tolui as a potential threat. As Tolui gains more glory for his victories in battle, Töregene becomes worried about whether her husband will be selected by his father as his successor.
Mongol invasions of Vietnam repeatedly ignored demands to attend the Yuan court and offer his personal submission to the Great Khan. By 1266, a standoff developed, as the Emperor Thánh Tông sought a loose tributary relationship, while Kublai demanded full submission. Trần Thánh Tông sent an official letter requiring Kublai to take his darughachi back. Because of civil war in the Mongol Empire, and the Yuan conquest of Song China, armed conflict was delayed. Instead, Kublai reminded him of the peace treaty signed by the Mongols and Đại Việt. As a result of the Mongol conquest of the Song Empire, by 1278–79, Mongol troops