Tseng Tsu-yu is another name for Tseng Sen, the son of Tseng Che and one of Confucius students. He was born into a poor family in Nan Wu Town during the Spring and Autumn Period of the Chou Dynasty and was admired for his obedient nature. He made a living at manual labor. Although he was not a highly talented person, he was able to understand Confucius philosophy. He passed Confucius' doctrines of loyalty and reciprocity down to Tsu Ssu, and wrote "Tseng Tsu", a book of 18 chapters. He is honored as the Tsung Sage.

Reference:《THE BRIEF BIOGRAPHIES OF THE SAINTS AND SAGES ARE IN THE TA CHENG HALL OF THE CONFUCIUS TEMPLE》published by Taipei Confucius Temple Governing Board