As we all know that the ending of Avataṃsaka is conducted to come back to the Pureland, but the relation between Amitabuddha and Vairocana is an eternal puzzle. This thesis is major on two Jātakas in Mahāyāna Sūtra. One is the Dharmākara Boddhisattva in Sukhāvati-vyūha Sūtra, another one is Sudhana in the last chapter of Avataṃsaka, namely Gandavyūha. By analyzing the narrative style and the meaning of these two Jātakas, it has reached some conclusions. (1) two Jātakas all use 53 as the symbolic number. (2) two Jātakas all retrospect to the origion of Sākyamuni′s enlightment. (3) two Jātakas all display the track of Boddhisattva basing on humanlife. (4) two Jātakas all use twofold construction to show that the Boddhisattva is transferring from the Buddhakṣetra. Because the two Jātakas all symbolize the previous life of Sākyamuni, so the two Boddhisattvas all be described as having experienced Eight Great Events like Buddha himself. For this reason, we can call the Boddhisattva as “returning Boddhisattva”. In conclusion, it is clear that the two Jātakas all use twofold construction, and from the concept of “returning Boddhisattva” to display “the unvisible background”. So if we come back to the view of the concept of the Buddhist History, this is indeed belonging to “the second viewpoint”, namely that the history of Buddhism is started before Sākyamuni Buddha. Anyhow through the analysis of the mingling shadow between religion and history, I wish it is clear to express the trans-historical meaning of Mahāyāna Buddhism.
