Cai E or Tsai Ao was a Chinese revolutionary leader and warlord. He was born Cai Genyin (蔡艮寅 "Cài Gěnyín") in Shaoyang, Hunan Province and his courtesy name was Songpo (松坡 "Sōngpō"). In 1898, Cai entered Shiwu School, where he learned from Liang Qichao. He later went to Japan to study in 1899. Cai returned to China in 1900. Wikipedia
