(roughly 1760- 1840) There are signs of failure at this time.
At that time, China was in the late feudal society,
Culturally, the literary inquisition flourished and the traditional culture was cut off;
Economic isolation completely cut off the possibility of embarking on the capitalist road;
Politically, both the monarch and the minister are immersed in the dream of a big country, and they are not enterprising and extravagant.
The second industrial revolution began in the middle of19th century (roughly 1870- 1900 in China, during the reign of Tongzhi and Guangxu).
China began to be invaded by western powers and became a semi-colonial and semi-feudal society. By the end of the second industrial revolution in the early 20th century, China had become a semi-colonial and semi-feudal society.
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By the way, the first sentence should be Qianlong Jiaqing, Jiajing is from the Ming Dynasty, but what you said is very easy to teach.
Sorry, it's Jiaqing. I didn't notice this mistake.