Beixiangtangshan Grottoes in Fengfeng Mining Area, Hebei, were originally drilled in the Beiqi era (500-577 AD). After that, the Yong, Tang, Song, Yuan and Ming generations have been drilled. There are still 16 grottoes, more than 4,000 statues, and the grottoes are drilled in the best stone rocks in Gushan, which are beautiful in the mountains and rivers and beautiful environment. The grotto is deep, and people hit their palms and sleeves in the cave, and they can make a loud echo, so the name is "sound hall".