The Origin of Song and Wang Bizhi's Talk with Scholars; Tang Taizong reads three volumes of Yuxian every day, and makes up for it in his spare time. He tasted it: "it is beneficial to open books, but it is not laborious."
The definition of "open book" is to open a book, which means reading. Metaphor is good for reading.
Story Song Dazu When Zhao Kuangyin established the Song Dynasty, there were still some separatist forces in various places. It was not until his younger brother Zhao Guangyi became emperor that the task of unifying the whole country was completed. After Zhao Guangyi acceded to the throne, he was renamed Zhao Guangling, known as Song Taizong in history.
After Song Taizong unified the whole country, it was determined to carry forward the traditional culture and ordered to sort out all kinds of ancient books. At the same time, it also attaches importance to the collection of various ancient cultural materials. During the Taiping Heavenly Kingdom (976-983). Ordered the compilation of three books, Taiping Guang Ji, Taiping Yulan and Wenyuan Huaying, which made important contributions to the preservation and development of chinese heritage.
Seven or eight of the ten ancient books cited in Taiping Yu Lan are now out of sight. So it can be said that it is a collection of cultural knowledge before the Northern Song Dynasty. The original name of this book is Taiping Bian. After editing, Song Dazong attached great importance to it and stipulated that he should read three volumes every day and finish them all after one year. So it was renamed "Taiping Magnolia", which means a book read by the emperor himself during the period of Taiping Xingguo.
Song Taizong's political affairs are very busy. He often fails to read this book as planned because he is dealing with other things, so he makes up reading in his spare time. The courtiers were afraid that he would study too long and affect his health. Taizong said, "As long as I open a book to read, I will get benefits, so I don't feel tired."
You're welcome, haha