In a corner of the south of the Yangtze River, there is a world of mountains, rivers, and human beings. The fool Huan'er doesn't care about fireworks, but he understands all things. Because of an acre of melons, life and death, grievances and hatreds, good deeds are fortunate, and sorrow is endless. Is it too wise to be foolish? Is it foolishness or wisdom? The explanation is unclear and the Tao is unclear, so it is better to read it yourself and understand the original meaning.