Au Fung-Chi () (1847–1914), was a Hong Kong Protestant church leader. He was an Elder of To Tsai Church (道濟會堂), which was Sun Yat-sen's place of worship while he studied medicine in Hong Kong. Au was Sun's teacher of Chinese literature, and gave Sun the pseudonym name Yìxiān ().王壽南. (2007). Sun Zhong-san. 臺灣商務印書館 publishing. , . p 23. Au was also the Secretary of the Department of Chinese Affairs.Rebecca Chan Chung, Deborah Chung and Cecilia Ng Wong, "Piloted to Serve", 2012
See also Names of Sun Yat-sen Christianity in Hong Kong
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