What is the name of the oldest classic in ancient China?

Yi is changeable, and Jing is law (or classic). That is, the Book of Changes, a rigorous philosophical work, can be used as divination in science. It is only because it is profound and difficult to understand that there are many far-fetched theories.

The Book of Changes is the oldest cultural classic in China and the first representative work of China traditional culture. Orthodox scholars of past dynasties praised it in many different languages. On the whole, they praised it as the "head of the group classics" and respected it very much. On the contrary, they think it is just an ancient divination book, which is close to the false words of Wu Zhu. It was only after Confucius' Biography of Zhouyi and many scholars in the past dynasties that the later talents blindly followed and respected it. What's more, since modern times, there have been many similar frivolous taunts. The Book of Changes was originally an ancient divination academic, but in the Shang and Zhou Dynasties, through the collation and annotation of King Wen, it was put into the academic field of "Heaven and Man" from the scope of divination, thus the Book of Changes became the foundation of China's humanistic culture. Since the Eastern Zhou Dynasty, it has been studied and described by Confucius and scattered as the source of hundreds of academic thoughts. This is an undeniable fact.

Therefore, we should study the culture of China, whether it is Confucianism, Buddhism and Taoism in the Spring and Autumn Period and the Warring States Period, or even Confucianism, Buddhism and Taoism after the Tang and Song Dynasties. If we don't explore the Book of Changes, we will forget our ancestors.