Literature was called ancient before 1840, China Modern was1840-19, and China Modern was191949.
The modern history of China is a history from the First Opium War (1840) to the collapse of the Nanking Kuomintang regime (1949) and the founding of People's Republic of China (PRC). The semi-colonial and semi-feudal society in China gradually formed and disintegrated after the late Qing Dynasty, the provisional government of the Republic of China, the northern warlords and the national government.
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.
The modern history of China can be divided into two stages. The first stage was from the Opium War in 1840 to the eve of the May 4th Movement in19/9, which was the stage of the old democratic revolution. The second stage is from the May 4th Movement in 19 19 to the eve of the founding of People's Republic of China (PRC) in 1949, which is the stage of new-democratic revolution.
References:
Modern History of China-Baidu Encyclopedia