Introduction to the Lilac Stele: The Lilac Stele is the treasure of Baiyi Nunnery and is the best-preserved inscription in existence. It records that "this temple (today's Baiyi'an) is the best of the mountain, and this plant is the treasure of this nunnery", and it is a cultural protection unit of Tai'an City. The yang of the stele depicts a centuries-old lilac picture, painted by Wang Ding, and the yin is the ancient snake calligraphy left by Mr. Liu Baofu, a farmer in Jiazhuang Village, Qiu'an.