Overturned one by one hill, into a valley tile factory town surrounded by azaleas, more than 2,000 meters above sea level. Hidden in the mountains of the small town of Muli County, I did not expect to be the county town of Muli, now also known as Rock Town, more than 70 years ago, Rock came to China not far from the mountains, wading in the water, and came here after all the hardships to enter his Shangri-La trip.