Introduction to the Sauerkraut tree: The Sauerkraut tree is located on the right side of Laolong Cave. According to legend, it was planted by the old man Yuexia to educate Ao Dang, the Dragon Prince of the East China Sea, and marry him to Princess Poyang. To this day, this tree is still evergreen all year round. It flies seeds every year but does not grow saplings. It has been listed as a key protected tree.