The western Sichuan-Yunnan and eastern Tibet areas where the Ma Ancient Road passes are typical Hengduan mountains in China, and also typical earth fold areas formed by the extrusion of South Asia plate and East Asia plate. The Minjiang River, Dadu River, Yalong River, Jinsha River, Lancang River and Nujiang River pass through here from north to south and from west to east respectively, forming the most unique mountain canyon landform in the world. Due to the barrier of mountains and deep valleys and the inconvenience of foreign exchange, the national culture in this area presents two outstanding characteristics: First, the cultural diversity is extremely prominent. Traveling along the ancient tea-horse road, anyone can deeply feel a phenomenon, that is, with the advance of the car, the architectural style, clothing, customs, spoken language and even religious beliefs of the houses in front of and behind the house are always as changeable as lanterns, which makes you overwhelmed. For this phenomenon, the local proverb has an image summary, which is called "different sounds in five miles, different customs in ten miles". This multicultural feature makes the ancient tea-horse road a charming and colorful national cultural corridor. Second, it has accumulated and retained rich national culture in its original form. Most of the valley areas where the ancient tea-horse road passes are channels for the migration and flow of ancient nationalities, and many ancient ancestors left traces here. There are still many primitive ancient cultural factors accumulated and preserved in local culture, language, religion and customs, and there are also many historical mysteries and clues to solve these historical mysteries. For thousands of years, cultural exchanges and communication have been going on silently and continuously, not only between the Han nationality and Tibet, but also between Tibet and other ethnic minorities in the southwest and even among ethnic groups in Tibet. There are not only conflicts and collisions between national cultures, but also positive interaction, integration and assimilation. In fact, it is this ancient tea-horse road that spans thousands of miles and crosses many different nationalities (or ethnic groups), languages and cultural areas on the Qinghai-Tibet Plateau. It is like a ribbon, connecting them organically, so that they can not only maintain their own characteristics, but also communicate with each other and develop together. Therefore, the ancient tea-horse road is not only a corridor where national cultures converge, but also an attractive area where various national cultures exchange and interact and retain their own inherent characteristics. As Mr. Fei Xiaotong said, this area "contains many historical sites that are still alive and should be a precious garden of history and language science"