Zhu Xi
Zhu Xi, whose family originated in Wuyuan County, Huizhou (in modern Jiangxi province), was born in Fujian, where his father worked as the subprefectural sheriff. After his father was forced from office due to his opposition to the government appeasement policy towards the Jurchen in 1140, Zhu Xi received instruction from his father at home.Many anecdotes attest that he was a highly precocious child. It was recorded that at age five he ventured to ask what lay beyond Heaven, and by eight he understood the significance of the Classic of Filiality (Xiaojing). As a youth, he was inspired by Mencius’ proposition that all people could become a sage. Upon his father's death in 1143, he studied with his father's friends Hu Xian, Liu Zihui, and Liu Mianzhi. In 1148, at the age of 19, Zhu Xi passed the Imperial Examination and became a presented scholar. Zhu Xi's first official dispatch position was as Subprefectural Registrar of Tong'an (同安縣主簿), which he served from 1153 - 1156. From 1153 he began to study under Li Tong, who followed the Neo-Confucian tradition of Cheng Hao and Cheng Yi, and formally became his student in 1160.
Xu Shen
Xu Shen ( CE) was a Chinese scholar-official and philologist of the Eastern Han Dynasty (25-189). He was born in the Zhaoling district of Run'an prefecture (today known as Luohe in Henan Province). During his own lifetime, Xu was recognized as a preeminent scholar of the Five Classics. He was the author of "Shuowen Jiezi", which was the first comprehensive dictionary of Chinese characters, as well as the first to organize entries by radical. This work continues to provide scholars with information on the development and historical usage of Chinese characters. Xu Shen completed his first draft in 100 CE but, waited until 121 CE before having his son present the work to the Emperor An of Han.
Xu was a student of the scholar-official Jia Kui 贾逵 (30-101). Under Jia, he established himself as a master in his own right and enjoyed a positive reputation. This education allowed him to hold several government offices at the prefecture level, and ultimately rise to a post in the royal library. Before undertaking the "Shuowen", he was already a prolific writer. Although lost, one of his better known early works was a commentary on the Huainanzi, an important sociopolitical work from the second century BCE.