The Buddha who enters the world, the path of freedom. Buddha seeks to save the world, Tao seeks eternal life.
There is no sun or moon in the fairy mountain, just a flick of the hand for ten thousand years. When all the stars fell, Song Yanchi stood in front of the glimmer of hope that heaven had opened for him. Not only did he see immortality and live as long as heaven, he also saw boundless loneliness, isolation and coldness.
Song Yanchi finally understood what Yun Feng said - it was too lonely.
Desire is boundless and there is no shore to turn back to.