Hu Huanyong
Hu Huanyong (, November 20, 1901 – April 30, 1998) was a Chinese demographer and the founder of China's population geography. He was born in Yixing, Jiangsu Province. He studied literature, history, and geography at Nanjing Higher Normal School. He continued his education at the University of Paris from 1926 to 1928. He returned to China and began teaching at National Central University where he was eventually appointed dean of the Department of Geography. He began teaching at East China Normal University (ECNU) in Shanghai in 1953, and in 1957 he became director of the research office of population geography at ECNU (which he helped to establish), the first demographic research institution in China. In a paper published in 1934 entitled, "Distribution of China's Population," he drew the Heihe-Tengchong Line, also called the Aihun (or Aigun, ancient name of Heihe)-Tengchong Line, which is known internationally as the "Hu Line." The line marks a striking difference in the distribution of China's population. References 

1901 births
1998 deaths
Chinese demographers
Educators from Wuxi
People from Yixing
Academic staff of the National Central University
Academic staff of the East China Normal University
Victims of the Cultural Revolution
Mathematicians from Jiangsu
Scientists from Wuxi
20th-century Chinese science writers
Writers from Wuxi