Who was  the last emperor or last "Son of Heaven" of China?
Emperor of China:  The emperor was also referred to as the "Son of Heaven" (), a title that predates the Qin unification and recognized as the ruler of "all under heaven" (i.e., the whole world). Puyi: Puyi (; 7 February 190617 October 1967), of the Manchu Aisin Gioro clan, commonly known as Pu Yi, was the last Emperor of China, the second-to-last Khan of Mongolia and the twelfth and final ruler of the Qing dynasty.
Puyi