Introduction to the Welcome Hall: The Welcome Hall is more than 200 meters long. Due to the sunlight at the cave entrance, the hall is covered with moss and karst deposits such as giant lions, jade toads, and rock pine; the top of the hall has a diameter of about ten meters. The circular skylight allows sunlight to shine directly at the bottom of the cave. The strings of water droplets dripping from the window edge seem to be scattered with thousands of money under the sunlight. It is called "Yuanguang Yidongtian", also known as "Luoqian Cave" There is a small hall next to the side wall, with a stalactite more than ten meters high, shaped like a rising mushroom cloud after a nuclear bomb explosion, named "Mushroom Cloud Hall"; there is also a circular pond with a diameter of about four meters in the hall. On the edge of the pond, you can watch the forest of stalagmites in the pond and the reflection of the cave window, which is called "Shadow Spring".