Lady Cai (Eastern Han)

Lady Cai (蔡夫人; fl.190-208) was a Chinese noble woman member of the Cai family of Nan Commandery during the Eastern Han. She was the later wife of Liu Biao, the Governor of Jing province, and a sister to Cai Mao, a prominent general in Liu Biao's service. Sources differ on whether she was Cai Mao's elder or younger sister.

She is best known for her unwavering commitment to favoring Liu Cong over Liu Qi in the competition for the governorship of Jing Province; This event ultimately paved the way for the succession of Liu Bei as the governor of Jing, the warlord who went on to establish the state of Shu Han, one of the three prominent states that emerged during the Three Kingdoms period (220-280 AD).