4. Yangzhou Grand Canal excavated by Yang Di.
1, which truly communicated the equipment between the north and the south of China and realized the first blending, understanding and unification in the history of China. China is high in the west and low in the east. With the North-South Canal, five rivers are connected in series. The existence of the canal brought the whole country into the realm of kingship. This unprecedented and complicated scheme has never been practiced before.
With the success of the Grand Canal, dozens of cities have been born along the river. There is a river first, then a town. The town was born of the river and prospered because of the river. These city chains along the Yangtze River not only meet each other, but also promote the great economic growth of China.
3. Beijing, Xi 'an (Luoyang, Kaifeng), Yangzhou and Hangzhou have been cultivated, creating a strong pattern of China.
4. The Grand Canal brought the long and splendid Central Plains culture to the north and south, and also brought the fish, rice and mulberry tea culture in the south and the nomadic grassland culture in the north to China. It has realized the diversification and co-melting of Central Plains culture. 5. The water system of the Grand Canal links the integration and communication between different ethnic groups, and also links the communication between China and the world. Including the western culture at the western end of the Silk Road and the marine culture of Southeast Asian countries. The cultural exchange between the two countries was brilliant, fruitful and far-reaching in the long historical period after the Grand Canal was dug in Sui Dynasty.