"A Guest from Heaven and Earth: The Biography of Sadura" is a historical biographical novel with the protagonist Sadura, a Mongolian poet in the Yuan Dynasty. Through his legendary life, the work shows the magnificent picture of the cultural integration of multiple ethnic groups in the Yuan Dynasty - from the grasslands of Mobei to the misty rain in the south of the Yangtze River, from the beacon fire of Yanmen to the imperial examination hall in Dadu, vividly portraying a cultural messenger who crossed national boundaries. Sadura is famous for his poems such as "Niannujiao: Climbing the Stone City". His spirit of "Don't let people praise the good colors, only leave the pure energy to fill the universe" has become a vivid footnote to the Chinese civilization's openness to all rivers. This book combines literary beauty and historical depth, providing a unique perspective for understanding the diverse and integrated Chinese civilization.