Introduction to the Singing of the Gods Picture: It is the Wanren cliff where Liu Ling’s sobering station is located. A sharp cliff like a knife stands majestically. The entire cliff unfolds gently like a page of paper. The characteristic textures on the cliff are crisscrossed horizontally and vertically, like a Dozens of gods gathered here, drinking, singing, and reciting poems, creating a joyful scene. It is said that the Cliff Book of Heaven was created by them.