Emperor Gaozong of the Tang Dynasty to the Kangxi Emperor much of the chosen emperors contemplated much of this when they became a contender for the mandate. The reason for this was because of the ambiguity of the Mandate and overwhelmingly unofficial formality when declaring the Mandate of Heaven. However, Kublai Khan was the only indifferent ruler when he claimed the Mandate of Heaven over the Yuan Dynasty since he had a sizable military and was part of the Khitan people, as with many others from the same background since they did not have the same traditions and culture as their Chinese adversaries.