Li fengchun According to Baidu Encyclopedia, Ang Lee is Li's son, and Ang Lee inherited his father's wisdom and talent and became an outstanding writer and swordsman, known as the "Sword Emperor". Li was a famous astronomer, mathematician and yin-yang scientist in Tang Dynasty. He was born in Qi Youyong (now Fengxiang County, Baoji City, Shaanxi Province). When he was young, he was smart, studious, well-read and proficient in astronomy, calendar, mathematics and Yin and Yang studies.