Stalactite introduction: According to the investigation and demonstration of Yulong Palace by authoritative domestic karst geology experts, Xiaowanggounao, where the karst cave is located, was a shallow sea bay about 200 million years ago during the Cambrian-Ordovician period. It was formed hundreds of millions of years earlier than the Shangluo Zashui Cave formed in the early stages of the Himalayan orogeny.