In recent years, there have been more and more dead souls in the underworld, and the queue in front of Naihe Bridge has to go to the earthly world. After discussion, the King of Hell of the Ten Palaces released a survival magic cube into the world, and those who got it were all people who were on the verge of death. There are nine "nodes" in the Rubik's Cube. If you pass these nine "nodes", you have passed the test of the underworld, and your life span will naturally be extended.
As the person who got the Rubik's Cube, Mu Qinghe died in the "node" every time, but he always followed Qi in his soul state. Qi always gave him a familiar feeling. Who is Qi?
Wei Qichen did not get the Rubik's Cube, but was pulled into the "Knot" many times. He survived after entering the "Knot" world, but does this count as passing the test of the underworld?