Introduction to the Turtle Stone: It is said that the Eight Immortals made a big fuss in the Dragon Palace of the East China Sea when they crossed the sea. The Dragon King went to heaven to complain, and the Jade Emperor sent heavenly soldiers to capture the Eight Immortals. Unexpectedly, this matter was known by the turtle in the sea, so he told the Eight Immortals the news and carried the Eight Immortals to this place to avoid disaster. When Taishang Laojun found out, he went to heaven to intercede. The Jade Emperor showed mercy and ordered the Eight Immortals to practice Taoism in the world and benefit the world. After receiving the order, the Eight Immortals bid farewell to the turtle and told it to practice peace of mind here, protect the holy mountain, and return to heaven with the Eight Immortals five hundred years later. After hearing this, the turtle turned into a strange stone and waited here, becoming the "Xuanwu" among the four guardian stones.