The most striking feature of China's history in Ming and Qing Dynasties is the consolidation of unified multi-ethnic groups and social crisis. Answer the following questions according to what you have

The most striking feature of China's history in Ming and Qing Dynasties is the consolidation of unified multi-ethnic groups and social crisis. Answer the following questions according to what you have learned: 1. 1) The absolute monarchy reached its peak and there was a comprehensive crisis in society. (1) A unified multi-ethnic country was further consolidated. (1) (2) Qi Jiguang fought against the Japanese pirates, wiped out the Japanese pirates in the southeast coastal areas, and safeguarded people's lives and property. (2 points) Zheng successfully recovered Taiwan Province Province and Taiwan Province Province returned to the embrace of the motherland. (2 points) The Qing army defeated Russia in two wars in jaxa, drove away the Russian invaders and defended the territory of the motherland. (2 points) (3) Zheng He's voyages to the West. (1) has promoted the economic exchanges between China and Asian and African countries, and strengthened the friendly relations between China and Asian and African countries. (1) (4) closed to the outside world. (1) Influence: It played a certain role in self-defense against foreign aggression, but it restricted the proper exchanges between China and foreign countries and China's absorption of foreign advanced culture and technology, hindered the progress of China society, and made China gradually fall behind in the world. (2 points) Feeling: Openness leads to prosperity, while closure leads to decline.

2. 1. Reclamation of farmland and frontier defense, the scale of land reclamation is unprecedented. 2. Migration and population growth. 3. Exploitation of mineral resources. Commercial trade has developed. 5. Establish various cultural and educational undertakings.

3. In the early 40 years of the Qing Dynasty, a strict sea ban policy was implemented, and coastal residents moved tens of miles inland, so they were not allowed to go to sea for trade without authorization-(developed) only the "Guangzhou Thirteen Lines" chartered by the Qing government managed and operated trade in a unified way.

Influence: Pro: It has played a certain self-defense role.

Disadvantages: Isolated from the world, unable to see the changes in the world situation, unable to learn advanced scientific knowledge and production technology from the West in time, making China gradually fall behind in the world.