Introduction to Biluo Cave: Biluo Cave is located at the southern end of Yanziyan, 1 km away from Baojing Palace. It is a "hole" formed by an above-ground river passing through an underground river. The cave is 82 meters long, with the entrance facing east to west. It is 34 meters wide and more than 10 meters high. It is shaped like an "eye in the sky". It can absorb the brilliance of the sun at sunrise and sunset. A clear stream passes through the cave. After entering the cave, it flows from south to north. The scenery is beautiful and the mountains and rivers are beautiful. It contains the mystery that "flowing water flows out of the cave of heaven, and the world is connected", and it has become a fairyland admired by Taoists. Ge Hong, a famous Taoist in the Eastern Jin Dynasty and a representative of the Danding Sect, came here to refine elixirs and practice Taoism.
There is a small cave next to Biluo Cave named Yunhua Stone Chamber. Later, because Emperor Liu Sheng of the Southern Han Dynasty visited here during the Five Dynasties and Ten Kingdoms, it was changed into the Yunhua Imperial Chamber. It is said that Ge Hong left here after the Dan was completed.
The long history of Biluo Cave has made it a famous tourist attraction since the Tang Dynasty. Literati and poets of all ages have left a wealth of poems and stone carvings here, including "Arriving in Difficulty" and "Arrived in Difficulty" written by Zhou Kui of the Tang Dynasty. "Biluo Cave - Fifteen Miles under Yingzhou" written by Su Dongpo, a great writer of the Northern Song Dynasty, is the most famous.