2. The Great Wall is a great project in ancient China and a symbol of China's historical civilization with a history of more than 2,000 years. Because of its unique historical, artistic and humanistic value, the Great Wall was listed on the World Heritage List in 1987. The "Great Wall" special stamps issued this time show the natural features and human landscapes along the Great Wall in the Ming Dynasty in the form of 9 pictures and tickets. It starts from hushan town, Liaoning (Hushan Great Wall) in the east and ends at Jiayuguan, Gansu in the west, and passes through Liaoning, Hebei, Tianjin, Beijing, Shanxi, Inner Mongolia, Shaanxi, Ningxia and Gansu provinces (autonomous regions and municipalities directly under the Central Government) from east to west. The content of the pattern is: Guanshan Canghai, chicken feed field.