According to Oddity Central, the phenomenon occurred on April 27, when a group of tourists was enjoying their journey in the national park. While on the way, they saw something unusual. Yang Xiaozhong, an experienced tour guide, noticed that the road they usually passed through had been blocked by something resembling fallen leaves.

In large numbers, they move like a living river, creating an extraordinary sight. Immediately, someone takes out their phone and records the incident. Because, they have never seen such a phenomenon before in years of working in the national park. They describe the size of the millipedes to be as wide as four meters and seemingly stretching over 50 meters.

This phenomenon has sparked speculation among people, with some considering it as a sign of upcoming natural disasters. When the video about the 'Thousand Legs River' went viral on social media, many people even called the national park staff to seek explanation. Some associate the behavior of animals with the possibility of an impending earthquake.