A disciple of Confucius in the late Spring and Autumn period, known for his filial piety and moral teachings.

An early Han dynasty statesman, known for his military achievements and for following the policies of Xiao He as Prime Minister, embodying the phrase 'Xiao's rules, Cao's follow.'

A scholar during the Hongzhi period of the Ming Dynasty, known as a 'virtuous gentleman' for his teaching and writings, including 'A Study of Surnames'.