Why can't I touch the eternal river?

The river itself is corrosive. According to the query of the Seven Classics, Tongtian River is the most important spiritual sea in the world, and it is a huge spiritual sea in life. All monks need to rely on this Tongtian River to practice, so the closer they get to the upper reaches of Tongtian River, the more aura they get. Therefore, in order to qualify as a clan in the upper reaches of Tongtian River, it can be said that the monks in the lower reaches will give anything, which shows the importance of Tongtian River.