(1) in common:

(1) all ended the long-term separatist situation and achieved national reunification.

(2) A new political and economic system was created and used by later generations.

(3) All of them have carried out large-scale engineering construction, and all of them have world-famous famous buildings.

(4) Being overthrown by the peasant uprising because of tyranny.

(5) They all died in the short-lived dynasty of II.

⑥ All of them provided lessons for the later dynasties and laid the foundation for the long-term prosperity in the future.

⑦ All have the characteristics of connecting the preceding with the following.

(2) Difference:

Times are different. Qin dynasty was in the initial development period of feudal society; Sui Dynasty was in the heyday of feudal society.

(2) Different ways to gain political power. Winning the government is to inherit the throne, then annex the six countries and establish a unified Qin dynasty; Emperor Wen of Sui came to power as a consort, seized power, established the Sui Dynasty, and then destroyed Chen to complete reunification.

③ The emphasis and influence of the founding emperor in governing the country are different. At the beginning of Qin Dynasty, he paid attention to politics and concentrated on establishing and consolidating a centralized state. Emperor Wendi of Sui Dynasty attached importance to economy as well as politics.

④ Different policies towards intellectuals. The Qin dynasty burned books to bury Confucianism, clamped down ideas and destroyed culture; The Sui Dynasty implemented the imperial examination system to attract scholars.

Summarize the reasons why the Sui Dynasty was a dynasty connecting the past with the future?

Connecting the past with the future: the unification factor was conceived in the division of feudal countries in the previous period, which was a great achievement of the Sui Dynasty.

Gloria: Digging the Grand Canal; Three provinces and six departments system and the establishment of imperial examination system; The feudal economy showed a prosperous situation, which laid the foundation for the prosperity of the Tang Dynasty.

(1) Politics: ① During the Northern and Southern Dynasties, the ethnic integration in the north and the economic development in the south of the Yangtze River created conditions for the unification of the Sui Dynasty. The unification of the Sui Dynasty ended the long-term separatist situation since the Sixteen Countries in the Eastern Jin Dynasty and opened the prelude to the "great unification" political situation in the Sui and Tang Dynasties. ② On the basis of summarizing the political system of the previous generation, the Sui Dynasty initiated the system of three provinces and six departments, which was used in the Tang Dynasty and further improved the centralization. (3) The Sui Dynasty used the previous system of selecting officials for reference, which was the first of its kind. The imperial examination system continued to be used in the Tang Dynasty. The influence of this system on later generations is far-reaching. (4) The tyranny of Yang Di led to the peasant uprising at the end of the Sui Dynasty, which led to the demise of the Sui Dynasty. The lessons of the collapse of the Sui Dynasty provided a reference for the rulers in the early Tang Dynasty and later generations.

(2) Economically: ① The Sui Dynasty adopted the land equalization system since the Northern Wei Dynasty and adjusted the rent modulation; The Tang Dynasty inherited the land equalization system of the Sui Dynasty, and further improved the taxation system of the Sui Dynasty. (2) On the basis of the previous generation, the economy of Sui Dynasty developed greatly, the cultivated land area increased greatly, the crop output increased, and the official grain storage was sufficient; The handicraft industry has made new progress, and the shipbuilding technology has reached a high level; Luoyang's business is prosperous, and thousands of wealthy businessmen live there. The feudal economy showed a prosperous situation. The economic development of Sui Dynasty laid the foundation for the prosperity of Tang Dynasty.

(3) Transportation: In order to strengthen the connection between the north and the south and consolidate the rule of the Sui Dynasty over the whole country, the Sui Dynasty dug a Grand Canal running through the north and south. The excavation of the Grand Canal played a great role in the economic exchanges between North and South at that time and later.

(4) Strengthening the connection between the mainland and the frontier: On the basis of the previous generation, the Sui Dynasty continued to strengthen the connection between the mainland and the frontier. Yang Di sent three people to beg for help, which is now Taiwan Province Province. Sui also sent people to the western regions, and many businessmen from the western regions came to Chang 'an and Luoyang. These measures in the Sui Dynasty laid a foundation for further strengthening the ties between the mainland and the frontier.

(5) Culture: The Sui Dynasty inherited the cultural achievements accumulated by the previous generation. Architecture, block printing, education, religion, literature and art all made new progress, which laid the foundation for the unprecedented prosperity of Tang culture.