Introduction to the relief mountain sign: On the front of the corridor connecting Lanchao Pavilion and Yongcui Pavilion, there is a white alabaster relief mountain sign. The black marble around the mountain sign is engraved with hieroglyphs and murals. On the north wall of the winding corridor, there is a mural "Eight Immortals Crossing the Sea", and on the east wall there is a mural "Pu Songling's Universe".