Gu Yanwu 顾炎武

Gu Yanwu (Chinese:顧炎武) (July 15, 1613 – February 15, 1682), also known as Gu Tinglin (Chinese:顧亭林), was a Chinese philologist and geographer. He spent his youth during the Manchu conquest of China in anti-Manchu activities after the Ming Dynasty had been overthrown. He never served the Qing Dynasty. Instead, he traveled throughout the country and devoted himself to studies.