Cai E (1882–1916), military leader who was a key figure in the establishment the National Protection Army 護國軍|护国军[Hu4 guo2 jun1], which in 1916 fought the forces of Yuan Shikai 袁世凱|袁世凯[Yuan2 Shi4 kai3], who had tried to reestablish the monarchy with himself as emperor

Cai Lun (-121), the inventor of the papermaking process

see 蔡甸區|蔡甸区[Cai4 dian4 Qu1]

Cai Xiang (1012-1067), Song calligrapher

Cai Dongfan (1877-1945), historian and historical novelist

Jolin Tsai (1980-), Taiwanese singer

Cai Yuanpei (1868-1940), educationist and politician, president of Peking University 1917-27

Cai Guoqiang (1957-), contemporary Chinese artist working with firework displays and light shows

Tsai Chih Chung (1948-), famous Taiwanese cartoonist specializing in retelling the Chinese classics

Choy Li Fut (Chinese martial art)

Caidian, a district of Wuhan City 武漢市|武汉市[Wu3 han4 Shi4], Hubei

Tsai Ing-wen (1956–), Taiwanese DPP politician, president of the Republic of China 2016–2024

Zeiss Company (Carl Zeiss AG, optical and opto-electronic industries. hq in Oberkochen, Germany)