In 2017 , a historian Professor Jones found the treasure box in the middle of the Gobi Desert . He was surprised to find the letter , the photo and the antiquated " iPhone ". Scientists confirmed that the letter and Xuanzhang ' s writing were authentic and they dated back from the Tang Dynasty , nearly one thousand and four hundred years ago . The discovery was so shocking that this made it to the headlines of all the newspapers . Yet everyone was skeptical and thought it was just a prank . Mr Jobs had already passed away and could not verify this . When Annette and Cynthia saw the news , they were glad that the group managed to complete their journey safely with the iPhone . Indeed a challenging mission was completed successfully with the help of modern technology !