Introduction to the ancient city of Maduo: The ancient city of Maduo has been an important post station and ancient ferry from my country to the border of Tibet since the Tang Dynasty. For thousands of years, there have been many messengers in green horses and yellow clothes, and monks preaching sermons on the riverside. Saddle and drink horses, many travelers from north to south, and merchants specializing in business eat and sleep in the open air here, and stay in the palace during the pilgrimage.