简介
六岁的李云霄和李云雪在破旧的家中庆祝生日，兄妹俩争相许愿长大以后要给母亲沈疏影买更大的房子。母亲欣慰地看着他们，却隐藏着不为人知的秘密。。In the heart of the Jordanian desert, the ancient city of Petra is full of mysteries. How was this architectural prowess achieved more than 2,000 years ago? © National Geographic。