Rera Yungdrung Ling Monastery was set up in 1894 by Gyangoen, and regarded as the ancestor monastery of Bon religion around Tibetan areas.
    There are quite a lot of legends about the formation of the temple. One of them said that as early as three thousand years age, Renchen (Bonists claims him to be the father of Padmanatesvara) had predicted there would be a big Bon temple coming into shape in this area, and the builder of the temple was the conqueror Tuomay coming from Nangwa, the present-day Aba Tibetan Autonomous Prefecture. In order to patronize Buddhism, Trisong Detsen had take all the measures he could to ban Bon religion before Padmanatesvara came to Tibet with the invitation of the Tibetan king. After Bon religion basically died out, Padmanatesvara foretold that it was nowhere else but Reila (the location of the Reilayungdringling Temple) where Bon religion would revive. Besides, four hundred years before the building of the Relayungdringling Temple, Nyanmay, the founder of the Menri Monastery (one of the ancestor monasteries of Bon religion), once prophesied that there would appear a big Bon temple at Rera.
     The deep channel to the south of the temple is the eastwardly rolling Brahmaputra. The highways to northern Tibet and Qinghai Province extend from the famous Dazhuka ferry, which is not far from the temple and separated from the Sino-Nepal highway by the river. Viewed on the Sino-Nepal highway, the red-colored temple on the other side of the river will strike your eyes. The building complex is constructed according to the terrain of the mountain and takes on in picturesque disorder. The yellow Lhazhang (Living Buddha's househou) and the white residences of the monks?are just inlayed in a striking red background. Close to the north of the temple is the holy Weilajieshang Mountain, in which Weilajieshang, one of the thirteen Protection Gods, reside. In the middle slope of the mountain are dotted with a great many piles of red Mani stones as well as meditation caves. Nearby the temple stands a giant rock fully painted with red dope, regarded as the residence of the God by the monks and local people. They treat it as sacred and worship the holy rock devoutly every year.
     Along with the introduction of Buddhism into Tibet, Bon religion fell on the verge of destruction in U and Tsang, and its influence became insignificant with its most temples and believers only existing in the Kham and Amdo Tibetan areas. But two of the most important ancestor monasteries of Bon religion, Rera Yungdrung Ling Temple and Menri Temple remain within the territory of Nanbulin of the rear Tibet.