This book tells the life story of Zhou Jianren, the third brother of Lu Xun. It delves into the complex relationship between the three Zhou brothers, all considered leading intellectuals from Zhejiang Province who significantly impacted modern Chinese history. Drawing on a wealth of primary sources, including diaries, letters, memoirs, newspapers, and personal files, the book explores Zhou Jianren's life and contributions to women's liberation, the sinicization of science, and the compilation of new textbooks.