According to historical records, in the 19th year of Zhenguan, Tang Dynasty, after returning from India, Xuanzang personally designed and built the Dayan Pagoda to worship the Buddhist scriptures, gold and silver Buddha statues, relic and other treasures brought back by Xuanzang  But until now, no one knows where the treasures brought back by Xuanzang are hidden  Archaeologists believe that, just as there is an underground palace under the ancient pagoda of Famen Temple, there must be an underground palace under the Dayan Pagoda, but it hasn't been excavated yet
It is speculated that the underground palace under the Dayan Pagoda may contain the treasures brought back by Xuanzang
Archaeologists have found Buddhist scriptures brought back by Xuanzang in other places.