What are the names of the three Buddha statues in Maijishan, Tianshui?

"One Buddha and Two Bodhisattvas" in Maijishan Grottoes. Sakyamuni, kneeling in the middle, with a solemn expression. The general trend on both sides is that the Bodhisattva and the Guanyin Bodhisattva stand upright, slightly lower than the giant Buddha, smiling and especially kind, as if they were welcoming guests coming and going with joy. We feel their kindness, and they impart great wisdom and great consciousness to those who believe in good men and women.