On the foundation wall of the Grandma Pavilion, there is an inlaid stone tablet with "bamboo-shaped" fossils. Where this stele was taken is now impossible to verify. According to experts' research, this fossil is over 200 million years old and is also known as the "right-angle stone". In the Qing Dynasty, people used ancient fossils to carve steles, which probably also contained the intention of lasting forever.