The seat outside the carriage is called the carriage board. Carriage, as an ancient mode of transportation, the driver is called the boss and the seat is called the board. Carriage has existed since ancient times, with a history of thousands of years. In ancient times, its role was mainly as a tool of war. Later it gradually evolved into a means of transportation. With the development of modern science and technology, wagons in rural areas are gradually replaced by modern agricultural machinery and equipment.