Tianlongshan Grottoes, lie 40 kilometers southwest of Taiyuan City at the hillside of Tianlong Mountain 1,700 meters high. The grottoes were first dug in the Eastern Wei Dynasty and continued to be made in the Northern Qi, Sui and Tang Dynasties. There are 27 caves with 8 on the eastern peak, 13 on the western peak, 3 to the northern side and 3 to the southwestern side. All are connected by cave paths. The Manshan Ge, a cave made in the Tang Dynasty, has two stories.

In the upper story, sits Buddha Meitreya 8 meters high, which is regarded as a masterpiece among the Grotto works of arts. In the lower story stands Buddha Guanyin (Goddess of Mercy) Statue 11 meters high, which is elegant in shape with clear touch in texture, representing the highest sculptural artistic value of Grotto art of its kind.