Fifty-eight volumes of Yimen Reading Secretary: It is a log record of He Chao's reading classics, history and books after reading.
The most famous is the revision of Hanshu, Houhanshu and The History of the Three Kingdoms. Li Baoyu, a scholar in the late Qing Dynasty, said that "books approved by celebrities can inspire people, and Mr. Yu Yimen is especially convinced". After five years of Qianlong, Fang Bao, assistant minister of the Ministry of Rites, ordered the Imperial Academy to collate the new edition. He kept close contact with famous bibliophiles such as Xu and Mao Yi this season, so he often saw unique cheats. There is a library "Yan Yanzhai" at home, with tens of thousands of books, many exquisite manuscripts of the Song and Yuan Dynasties, and three small houses full of buildings. Each book is engraved or marked with the words "Talking about the past", "Fear of old age" and "Being kind to others and writing a suicide note". There are also library buildings, such as Qingyang Zhai, Bijun Caotang, Chenglan Shushu and Telford Hall. The book collection is printed with Life in imperial academy, Crazy Life in Wuxia, Not Being an Official in Yuan Dynasty, Collection of Books in Yimen, Qingyangzhai, Han Festival, Home in Fenggang North, Idle Officials Can't Cultivate Talents, Home in Taohua West Village, Wandering around, Little Officials in Inception, and Yellow Silk. After his death, Emperor Kangxi was deeply sorry and awarded a bachelor's degree as a lecturer. His works include Notes on the History of Learning Difficulties, Notes on Ancient Chinese Knowledge, Secrets of Reading Yi Men, He Yi Men Ji and so on. He Chao is well-read and good at textual research. Collating ancient monuments is the best. I like to copy the Jin and Tang dynasties, and the original works and running scripts are integrated into the products. At that time, people thought that they could be compared with the calligraphers of Jin and Tang Dynasties, and they were called the Four Masters of Kangxi. He was ordered to write Notes on Four Books for Emperor Kangxi, carve them into wooden blocks and hide them in the palace. Most of the books in the palace are excellent collations. Before Yong Zhengdi took over, he asked Long to write a Notes on Sleepiness.