Zhu Xi
In 1179, after not serving in an official capacity since 1156, Zhu Xi was appointed Prefect of Nankang Military District (南康軍), where he revived White Deer Grotto Academy. and got demoted three years later for attacking the incompetency and corruption of some influential officials. There were several instances of receiving an appointment and subsequently being demoted. Upon dismissal from his last appointment, he was accused of numerous crimes and a petition was made for his execution. Much of this opposition was headed by Han Tuozhou, the Prime Minister, who was a political rival of Zhu's. Even though his teachings had been severely attacked by establishment figures, almost a thousand brave people attended his funeral. After the death of Han Tuozhou, Zhu's successor Zhen Dexiu, together with Wei Liaoweng, made Zhu's branch of Neo-Confucianism the dominant philosophy at the Song Court.
Shizi (book)
The oldest surviving reference to Shizi is found in the (91 BCE) "Shiji" "Scribal Record" biography of Xunzi (c. 312–230 BCE). 
And (in addition to Xun Zi, the state of) Zhao also had Gongsun Long, who made arguments about the similarity and difference of hardness and whiteness, and the sayings of Ju Zi; (the state of) Wei had Li Kui (with his) teaching on fully using the powers of the land; (the state of) Chu had Shizi, Chang Lu, and Yu Zi from A in it. Following from Meng Zi down until Yu Zi, the world has their writings in abundance; therefore (I) will not discuss their biographies. (tr. Fischer 2012:794-797)