Railway Yin-Yang Guardian

Behind the glittering city lies a mysterious world of supernatural powers. After the protagonist, Zhang Xiaofan, meets the Fox Immortal, the two embark on an adventure to find fragments of the powerful "Treasure That Suppresses Yin." They navigate traps in a valley and receive a letter with the help of an old turtle, learning that a fragment lies on an island off the East China Sea. To reach it, they must overcome three trials: the Forest of Mist, the Abyss of Quicksand, and the Phantom Formation. They find their way through the mist, battle sandworms in the quicksand, and endure absurd trials in the phantoms. At a temple on the island, they learn the ancient origins of the "Treasure That Suppresses Yin." After completing a mission to seal a demon beast, they discover that the fragment is connected to the Dragon Palace of the East Sea and its Sea-Calming Pearl. The two arrive at the Dragon Palace, where the Dragon King gives them a hard time. To borrow the Sea-Calming Pearl, they must solve the problem of the Ruyi Coral, which has stopped producing pearls. They discover that a giant octopus is behind it, and a fierce battle is about to begin. Will they manage to borrow the treasure and find the fragment? The suspense is mounting.