Reed Flute Cave is located on the south side of the Taohua River in Guilin City, on the southern side of Guangming Mountain. There is a kind of reed grass in the original mouth of the cave. It is said that the flute can be used to make a pleasant sound. Reed Flute is named after it. The formation of Reed Flute has gone through a long period of time. It was originally an ancient underground lake 1 million years ago. Due to the elevation of the crust movement, the groundwater level dropped and the underground lake became a cave. Later, the groundwater formed by the rain flowed along many broken belts in the mountain, dissolved calcium carbonate in the rock and became a solution containing carbonate and calcium ions. When groundwater flows from the rock gap into the hole, the carbon dioxide overflows and the calcium ions precipitate and crystallize. After years of accumulation, it forms a variety of stalactites. People praised Reed Flute Rock as a palace of nature. In the Tang Dynasty, more than 1,000 years ago, some people came to visit Reed Flute Cave. The stone walls of Reed Flute left many ancient inks. Reed Flute Cave can be said to be the most net red cave in Guilin. Its title of "Guobindong" has made tourists screaming. It is said that some people in the Tang Dynasty in front of the 1000-year-old reed flute rock picture came to Reed Flute Cave, and later received countless national leaders.