CAI Yuan-ding, born in Jianyang (a city in Fujian province today), is a know-all who did research into a host of fields, ranging from Confucianism, Confucian classics to music and medicine.

• 摘要南宋建阳人蔡元定是个通儒，研究领域广、著作多，其理学、经学、堪舆、音乐与医学领域成就皆有可观者。