The name of Tianzhong mountain has been seen in official history since Tang Dynasty, the reason of which is that Yan Zhenqing put Tianzhong mountain himself, thus the inscription became its name. History says, in the third year of Jianzhong, Tangdezhong 唐德宗建中三年(AD782), Huaixi Li Xilie was revolting to Tang. The second year, Yan was sent to Xuchang to comfort Li's department and just when Yan wanted to read out emperor's order, over thousand of Li's familiar soldiers and the foster sons surrounded Yan, hand knife, murderous look around. Yan didn't change the color of his face, not going behind half step. Then Li hence drink back to all polite and promised high official positions to rebel against the court. However, Yan would rather die than to give in. Then Yan was sent to Caizhou(now Runan), where he wrote the characters of Tianzhong mountain. After Huaixi's rebel was put down, people established Yan Lugong temple 颜鲁公庙 in the Runan city in honor of Yan. Owing to Yan's writing Tianzhong mountain, this mountain became famous all the world.