What is the dividing line between modern history and ancient history?

1. The dividing line between ancient history and modern history is 1840, the first opium war between China and Britain, and the dividing line between modern history and modern history is 19 19, the May 4th Movement.

2. The ancient history of China, which began with Yuanmou people about 654.38+0.70 million years ago and ended before the Opium War of 654.38+0.840 years ago, is the history of primitive society, slave society and feudal society in China.

3. The modern history of China lasted from the Opium War (1840) to the founding of New China (1949). The modern history of China is a history of humiliation full of disasters, backwardness and beatings, a history of China people's exploration of saving the country and realizing freedom and democracy, and a history of China people's struggle against aggression, overthrowing imperialism and realizing national liberation and feudalism and people's prosperity.