Zhang Boju
Zhang Boju (March 14, 1898 – February 26, 1982) was a Chinese collector, painter, calligrapher, poet, and Peking opera researcher. His biological father was Zhang Jinfang (1872–1942), and his adoptive father was Zhang Zhenfang, who served as the Viceroy of Zhili and the Governor of Henan during the late Qing dynasty. His maternal cousin was Yuan Shikai. Zhang Boju is often considered one of the "Four Gentlemen of the Republic of China."