Please tell us about the important role of the opening of the Grand Canal in the Sui and Tang Dynasties.

Benefits of the opening of the Sui Dynasty Grand Canal:

1. It brought the Central Plains culture to the north and the south, and also brought the northern grassland nomadic culture and the southern fish, rice, tea and water town culture. In the Central Plains, the diversification, complementarity and complexity of Chinese culture were realized.

2. The Grand Canal of the Sui Dynasty created three world cities: Yangzhou (including Hangzhou), Xi'an (including Luoyang and Kaifeng), and Beijing (including Tianjin). Yangzhou is the starting point of the Grand Canal, Xi'an is the midpoint, and Beijing is the end point. The Grand Canal has turned these three points into a large-scale city that plays a decisive role in Chinese history, either the capital or an economic city. It has become the national political center, economic center, and cultural center, and its influence is both profound and far-reaching.

3. The Grand Canal of Emperor Yang of the Sui Dynasty ushered in the Kaiyuan rule of the Tang Dynasty and laid the foundation for the rise of Tang culture in the world. Although the Sui Dynasty was short-lived, it resulted in the long-lasting rule and prosperity of the Tang Dynasty.

Disadvantages of the opening of the Grand Canal in the Sui Dynasty:

1. The construction of the Grand Canal overused the people's power and brought a heavy burden of corvee to the working people.

2. The construction of the Grand Canal intensified class conflicts. During the construction process, torture was indiscriminately used to suppress the popular resistance movement.