Most of the figuration representation of Maitreya Bodhisattva in preaching on the heavenly palace of Tu?ita had composition on upper level of the front facing of the main chamber with a central pillar build inside of cave of the Kucha Grottoes,facing to the Buddha statue of(S′)ākyamuni,which is situated in the center position of the arched niche attached to the front facing of the central pillar.The arrangement of composition must be influenced by the overwhelming Hinayana doctrine that were extremely popular in Kuche at that time.And It also reflected the idea of Hinayana Buddhism of solemnity on the worshipper of One Buddha and One Bodhisattva.Maitreya,or the Buddha of the Future,will descend to the world of mortals from Tu?ita and succeed ?ākyamuni in becoming Buddha,were cult by Buddhist believers.The discovered of Sūtra of meditation on Maitreya Bodhisattva’s Rebirth on High in the Tu?ita Heaven written both in Tukhara A and Uighur is a well-preserved textual proof that testify the fact that Maitreya belief was very popular in this area.Besides,those Maitreya Statues which is situated in front of the central pillar of Cave 58,63,114 of the Kizil Grottoes also proofed the popular worshipping of Maitreya Bodhisattva and some religious elements of Persia from the Central Asia had been found among the composition of the main belief in Maitreya.
