A Taiwanese boy learns Chinese at Chien Mu's old home "Sushulou" in Waishuangxi of Shilin District, Taipei, Taiwan, 2015. Chien, who was considered to be one of the greatest historians and philosophers in 20th-century China, relocated to Taiwan in October 1967 after accepting an invitation from the then President Chiang Kai-shek in response to the Hong Kong 1967 Leftist Riots.