What do "Poetry" and "Book" refer to?

"Shi", also known as "The Book of Songs", is the earliest poetry collection in China. The Book of Songs was originally called "The Book of Songs" and contains 305 poems, also known as the "Three Hundred Poems". Since the Han Dynasty, Confucianism has regarded it as a classic, so it is called "The Book of Songs". "Shu", also known as "Shang Shu" and "Shu Jing", is a collection of documents in multiple genres and is the earliest existing history book in China. During the Warring States period, it was generally called "Shu", and in the Han Dynasty it was renamed "Shangshu", which is the "book of ancient times". Because it is one of the Five Classics of Confucianism, it is also called the Book of Books.

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