Gao Lishi
Gao Lishi was born in 684, when Empress Dowager Wu (later known as Wu Zetian) was successively regent over her sons Emperor Zhongzong (Li Zhe/Li Xian) and Emperor Ruizong (Li Dan). He was from Pan Prefecture (潘州, roughly modern Maoming, Guangdong). His original family name was Feng (馮), and he was reportedly a great-grandson of the early Tang local government official Feng Ang (馮盎). In 698, a local official, Li Qianli (李千里), submitted two young eunuchs to Wu Zetian, who had by that point taken the throne as Empress regnant as tribute; one was Lishi (who had not yet taken the name of Gao at this point), and one was named Jin'gang (金剛). Wu Zetian favored Lishi for his intelligence and kept him as an attending eunuch. Later, however, Lishi committed a minor fault, and she had him battered and expelled from her presence. An older eunuch, Gao Yanfu (高延福), took Lishi as an adoptive son (and thus had Lishi take his own name of Gao), and as Gao Yanfu had previously served Wu Zetian's powerful nephew Wu Sansi the Prince of Liang, he had Gao Lishi serve Wu Sansi. After about a year, Wu Zetian summoned him back to her palace, and he again attended her. He eventually grew to be exceedingly tall. As he was careful, he was put in charge of announcing imperial edicts, and was eventually promoted to be "Gongwei Cheng" (宮闈丞), a highly ranked eunuch.