Xia Huanggong also known as Huang Shigong 黃石公|黄石公[Huáng Shí gōng] (dates of birth and death uncertain), Daoist hermit of the Qin Dynasty 秦代[Qín dài] and purported author of “Three Strategies of Huang Shigong” 黃石公三略|黄石公三略[Huáng Shí gōng Sān lüè], one of the Seven Military Classics of ancient China 武經七書|武经七书[Wǔ jīng Qī shū]