What spirit did people in the Tang Dynasty embody in the choice of teaching materials?

Tang people embodied a kind of "pragmatic" and studious spirit in the selection of teaching materials. For example, in Three Rites, The Book of Rites was the first choice for Justice of the Five Classics, which has always been ignored. Although The Book of Rites was written independently at the end of the Eastern Han Dynasty, it was understood and respected by people very late. Compared with the boring and difficult-to-read Book of Rites and Zhou Li, the content of Book of Rites is closer to daily social life, including etiquette, etiquette, rules of daily life, words and deeds of Confucius and Confucianism, Confucian papers, seasons, historical materials and many other contents. Compared with books like The Book of Rites Official List, it has a wide range of contents, simple language and wide adaptability. For another example, in the Tang Dynasty, Confucian textbooks such as The Analects of Confucius, The Classic of Filial Piety and Er Ya were also promoted to the level of classics. When Xuanzong of Tang Dynasty wrote Six Classics of Datang, it was stipulated that the Five Classics should be emphasized in the teaching process and the imperial examination, and the Analects of Confucius and the Classic of Filial Piety should be studied at the same time. When he arrived in Tang Wenzong, the imperial court appointed Qin Zheng as the prime minister, and in the second year of Kaicheng (837), according to his memorial, he carved the Nine Classics on a stone and erected a monument in imperial academy, Chang 'an, which was called "Tang Kaicheng Stone Classics". During the years of Wenzong and Taihe, the number of stone classics increased to 12. Besides the Analects of Confucius and the Classic of Filial Piety, Erya was added. The introduction of these three books into Confucian classics greatly promoted the education of Confucian classics in Tang Dynasty. In the view of the rulers, the Analects of Confucius, as Confucius' speech, and the Book of Filial Piety, as the foundation of loyalty to the monarch, contain the most basic ideological content of Confucianism. In addition, these two books are concise and short, not as difficult to understand as the Five Classics, so people who are proficient in writing can learn to read and recite, which is conducive to the official thoughts being deeply rooted in the hearts of the people. Erya is a special classic and a tool to interpret ancient books. Besides explaining the Five Classics, its exegetical materials include Chu Ci, Zhuangzi, Mu Zhuan, Guan Zi, Lv Chunqiu, Guoyu and Book of Rites. It is very suitable for the cultural and educational policy of the Tang Dynasty, which is dominated by Confucianism and a hundred schools of thought contend. In teaching, its main function is to make Confucian classic language analysis a high-level knowledge, which is valued by educators. Later generations compared Er Ya to "the home of the Six Classics, the main source of scholars". (Song Lin Guangfu's On Ai Xuan Shi) is known as "the deep sea of exegesis and the ladder navigation of the Five Classics." (Song Qing Xiang Feng's Preface to Er Ya Guo's Annotation on Righteousness) Their understanding all originated in the Tang Dynasty.