Hu Xu (1655-1736), zi cangxiao, number purple string. Guangshan south to shop Tiger Mountain people. Since childhood, he has been diligent and studious, reading a lot of books and writing articles. He often immersed himself in the study of "Zhou Yi", and his achievements were quite profound. After being introduced, he studied in Kangxi from Chen, and was summoned many times, saw the doubts in the gua yao, ordered to draw pictures to explain, and was even appreciated by Kangxi, praised as a "really hard-working reader", and was immediately promoted to the reviewer of the South Study. In 1716 (the fifty-fifth year of the Kangxi Dynasty), he was promoted to the position of Secretary of the Hongxu Temple.
In the first year of Yongzheng (1723), he was awarded the cabinet bachelor ceremonial department attendant. For four years, he was appointed as a military attendant, served as a trial reading officer in the temple, and taught Shu Jishi. For five years, he was the assistant left deputy capital of the Imperial Household Department of the Right Attendant. For eight years, he served as the president of the "History of Ming" and entered the Zhishang Study House as a soldier's attendant Zhi Gongju. For nine years, he was transferred to the left attendant of the Ceremonial Department. In June of that year, Tian Wenjing, the governor of Hedong, was deposed and returned to his hometown for reasons such as "his heir Meng basically had a different surname, and he was not suitable for impersonating the official's dependents". In 1736, (the first year of Qianlong), the official was reinstated, and Yin sealed his son into the State Zijian to study. Soon after, he died in Beijing. Emperor Nianqi was made an old minister of the third dynasty, and gave him 500 taels of platinum, and the funeral was like a ceremony.
Hu Xu's life was thick with customs and education as a prerequisite. When he was teaching in Anyang, he advocated that all sentient beings take the lead in changing customs and customs, and that those who had a coffin that had been suspended but not buried should be buried for more than 1,500 coffins a day, and for marriage, they advocated "no excessive fees" and handled them simply. After entering Beijing, he urged the imperial court. "Heavy peasants and sang punishment, first benevolence and righteousness and then utilitarianism", "Guangyan Road, Yu Accumulation, Floating Grain, Provincial Redundant Officials, Equal Power".
Hu Xu wrote many works in his lifetime, the most representative of which is the "Zhou Yi Letter Book". In addition, there are 27 volumes such as "Farmland Essentials", "Bufa Shuokao", "Yun Yu Han Zhong", and "Poetry Collection". The "Book of Zhou Yi Letters" still has great academic research value, and the "original picture" part of it is more "unique experience". Because some of his insights and philosophical ideas contradicted the interests of the ruling class, most of his writings were not published.