Introduction to Grotto No. 5: There is a marble stele erected next to Grotto No. 5, which is engraved with details about the cave: "Cave No. 5 is the largest cave in the Yangtou Mountain Grottoes. It is characterized by one stone and three stones. The cave was opened. There were many inscriptions in the cave, but most of them are now difficult to decipher. Only the inscription on the lower right side of the stone wall is still clearly visible. The year number is AD 505, the second year of the Zhengshi period of the Wei Dynasty. The cave on the east side is deeper and more carved. It is the two Buddhas of Sakyamuni Duobao. It is a "sharp-bone statue" with arms as big as the knees and slender limbs, typical of the Northern Wei Dynasty. "