The place where Princess Wencheng shattered the Sun and Moon Treasure Mirror is called Riyue Mountain

Princess Wencheng, on her long journey westward for a marriage alliance, carried with her a precious item known as the "Sun and Moon Treasure Mirror". It is said that whenever the princess yearned for home, she could look into this mirror and see the landscape of the Tang Dynasty. However, while passing through a mountain, the princess, longing for her distant homeland, couldn't help but take out the "Sun and Moon Treasure Mirror" given to her by the Empress before departure to gaze upon it, and instantly, the enchanting scenery of Chang'an appeared in the mirror. At that moment, Princess Wencheng, overwhelmed with mixed emotions of joy and sorrow, accidentally dropped the mirror, breaking it into two halves, which landed on two small hills. The eastern half faced west, reflecting the afterglow of the setting sun, while the western half faced east, illuminated by the light of the rising moon. Thus, the name Riyue Mountain was derived.