tea. Caravan is well organized, consisting of palm gang, pot head, squad and handle. The Palm Gang is the president of the Big Horse Gang, and it is held by the pot heads recommended by all the pot heads of the gang, commonly known as the Palm Gang pot heads. Pot head is the most basic independent unit in the caravan, which is not only the name of a caravan, but also the name of the caravan leader. They stir the horse spoon in the same pot, and their leader is commonly known as the "horse pot head". The ancient tea-horse road originated from the ancient "tea-horse trade". It can be said that there was a "tea-horse trade" first, and then there was an "ancient road". The traditional caravan dishes refer to wild vegetables, flowers, birds, insects and fish, which, after primitive rough processing, have become the rations for horse drivers to satisfy their hunger on the road. Therefore, the most expensive thing is tea.