1938年10月,在中国大地上正处于国共合作抗日之际,毛泽东在延安为失去年轻有为的抗日军政大学教授杨兰史亲笔题写悼词。杨兰史,原名杨衍祥,广东省大埔县百侯镇人(土地革命时隶属于闽西苏区),1907年出生,刚满周岁时,父亲病逝、母亲改嫁,兰史成为孤儿,靠祖父杨子和抚养成人。 In October 1938, while the Kuomintang-Communist cooperation was being resisted against Japan in the land of China, Mao Tse-tung personally wrote a eulogy in Yan’an to Yang Lanshi, a young and promising professor of anti-Japanese military and political universities. Yang Lan Shi, formerly known as Yang Yuxiang, was born in 1907 in Dabu County, Guangdong Province. When his father died, his mother remarried. Lan Shi was orphaned, relying on his grandfather Yang Zihe Raise adults.