He meets Kublai Khan.

他与忽必烈会面。

Kublai Khan welcomed Marco and his father.

忽必烈汗热烈欢迎马可父子二人。

Yuan of the Mongols. Genghis Khan and Kublai Khan.

当时元世祖忽必烈汗正统治着中国。

As Kublai Khan grew older, they feared for their safety.

由于忽必烈逐渐老迈，他们担心自己的安危。

Polo 's travelogue mentions that Kublai Khan sent envoys to Malgache.

马可波罗游记中提到忽必烈曾派使节到过马尔加什。