From 65438 to 0206, Temujin unified the north and south of the desert and established the Mongolian khanate of military slavery. Mongolian nobles adopted the strategy of conquering the southwest provinces first, and then forming a north-south attack on the Southern Song Dynasty. To this end, they first conquered Dali. 1253, the first commander-in-chief of the Mongolian Khan faction led an army of 65438+10,000,000, divided into three ways, pointing directly at Yunnan. The middle route will be led by him personally, crossing Dadu River in the south, Jinsha River in the west, and East Lijiang, East Lijiang and Dali in the south. In September of that year, Kublai Khan led an army to the west bank of Jinsha River and ordered soldiers to kill cattle and sheep, plug their anus and use them to cross the river (in the first bay of the Yangtze River today). After crossing the river, he entered Lijiang and defeated the defenders of Dali. This is the origin of the allusion of "Yuan Guo Bao Bao" in Changlian of Daguanlou, Kunming. "The Yuan Dynasty crossed the purse", which promoted the unification of Kublai Khan's Ping Dali Kingdom and the Yuan Dynasty, and ended the history of China's division since the late Tang Dynasty. "Yuan Guo Bao" is one of the major events in Lijiang history, and Lijiang area is the specific place where this event happened. Although it is a long time ago, we can still find the historical traces of the ancient battlefield of swords and horses. There is also a legend about the origin of Baoshan Stone Town, which looks like a dragon head from a distance, so there are many legends about the origin of Stone Town: according to legend, it is a land of geomantic omen, rich in rice and numerous talents. King Mu was very afraid that the talented warriors there would seize his country and sent people to watch it day and night. One night, a star landed on Azhu Mountain on the other side of the river. Knowing that there really was a saint there, King Mu quickly took a treasure knife and led his army to Baoshan. Sure enough, one day, the wind was strong and the clouds were thick. A glittering dragon flew from mid-air to Mount Aju, and as soon as it reached the river, it bowed its head and drank water. Wood king jealous attack, Lapras unprepared, raised his nod to cut, cut off the dragon's neck. This dragon was originally the predecessor of the sage of Azhu Mountain. After being killed, the dragon head became a stone city and the dragon body became a water mountain.