Xia Huanggong also known as Huang Shigong 黄石公huángshígōng (dates of birth and death uncertain), Daoist hermit of the Qin Dynasty 秦代qíndài and purported author of “Three Strategies of Huang Shigong” 黄石公三略huángshígōngsānlüè, one of the Seven Military Classics of ancient China 武经七书wǔjīngqīshū