What is "essence, reality, quality and achievement"

Classic and History Subsets is the classification of classics by ancient scholars in China.

"Classics" refers to the religious and political dogma and ethical norms in ancient society, mainly Confucian classics, such as the Four Books and Five Classics, the Six Classics, the Thirteen Classics, and Baihutong.

"History" refers to historical classics, such as Historical Records, Hanshu, The History of the Three Kingdoms, Zi Zhi Tong Jian and so on.

Zi refers to hundred schools of thought's research since the Spring and Autumn Period and the Warring States Period, such as Xunzi, Laozi, Zhuangzi and Lun Heng.

"Collection" refers to ancient poetry works, which are divided into general collections, selected books and other collections, such as Yuefu poetry collections, ancient poetry collections, complete works of Tang poetry, and ancient literature views.