Po Shan was also called Tsu-chia(子夏), born during the Spring and Autumn Period in the kingdom of Wei, 44 years after the birth of Confucius. He was excellent in literature and loved to study poetry. Confucius classified him in the group of people who specialized in literature. Once he served as an official in Chu Fu of the kingdom Lu. He taught people of humanity. ''Your knowledge must be vast and profound, and your goals, consistent. All aspects of a matter must be made clear through inquiry. Consider first the light and simple aspects, then the more difficult and complicated ones. Then you will find humanity " He later lectured in a place called Hsi Ho. Wei Cheng-tsu, an official of the kingdom of Chin, honored him as his teacher.
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