What kind of book is the Three Character Classic?

The Three Character Classic, together with The Hundred Surnames and The Thousand Character Classic, is known as the three great national enlightenment readings (of which The Thousand Character Classic exists in different versions such as The Ancient Thousand Character Classic, The Narrative Ancient Thousand Character Classic, The Continuation of the Thousand Character Classic, and The New Thousand Character Classic). The Three Character Classic is a precious cultural heritage of the Chinese nation. It is short, concise and catchy, and has been a household name for thousands of years. Its content covers history, astronomy, geography, morality and some folk legends, and it is said that "if you familiarize yourself with the Three Character Classic, you can know a thousand things from ancient times". Based on historical reasons, the Three Character Classic inevitably contains some spiritual dregs and artistic flaws, but its unique ideological value and cultural charm is still recognized by the world, and has been regarded as a classic by successive generations of Chinese people and constantly passed down.