Highlights: The famous Riyue Mountains is between Xiningi City and Qinghai Lake. There is a time-honored beautiful story: when Princess Wencheng of the Tang Dynasty entered Tibet, she broke her beloved stone mirror here. The stone mirror was divided into two parts, the sun and the moon, which later became this Riyue Mountains (Sun and Moon Mountains) Today, on both sides of the Riyue Mountains, there is a small mountain peak, and two landmark buildings, Ri Pavilion and Yue Pavilion, are built on them.