1. The earliest extant annotated version of "The Book of Songs" is the "Book of Songs" annotated by Mao Heng and Mao Chang of the Han Dynasty, so it is also called "Mao Shi".
2. The Book of Songs is the earliest poetry collection in my country. A collection of 305 poems from the Zhou Dynasty. In the pre-Qin period, it was only called poetry, not the Book of Songs. The word "经" was added by Han Confucians. The Book of Songs was burned in the Qin Dynasty and was handed down again in the Han Dynasty. There are four families of poets, namely Qi, Lu, Han and Mao. The first three have been lost one after another, and only Mao's "Book of Songs" remains.
3. Most of the poem authors in the Book of Songs cannot be verified. Most of the poems recorded in the Book of Songs come from the folk. It is said that the Zhou Dynasty had a special poetry collector to collect folk songs to understand folk customs and political gains and losses. Most of the poems in the Book of Songs come from this. The other part is composed of poems presented by ministers and scholar-bureaucrats to the Emperor of Zhou, most of which are in the style of praising virtues.