Outstanding mathematicians and astronomers in the Southern and Northern Dynasties. The word Wen Yuan. My ancestral home was in Fanyang County (now Laishui, Hebei Province), and I moved to Jiangnan that year. My father and ancestors were well versed in natural calculation and learned, and were respected by people at that time. When I was young, I entered China Forestry University to engage in academic research. Since then, Shi Li and Liu Song Nanqi, the official to Changshui a captain. He has made great achievements in mathematics, astronomical calendar and mechanical manufacturing.