2. The beginning of China's modern history 1840 The first Opium War was the beginning of China's modern history, and its end marked the outbreak of the May 4th Movement in 19 19.

3. The beginning of China's modern history was marked by the outbreak of the May 4th Movement in 19 19.

4. The ancient history of the world began in the Paleolithic Age and ended in the British bourgeois revolution in 1640.

The beginning of modern world history was the British bourgeois revolution, and the end marked the victory of Russian Lenin's October socialist revolution.

6. The beginning of modern world history was marked by the victory of the socialist revolution in Russia in October, the establishment of the first socialist country under the dictatorship of the proletariat in the world, and the breaking of the unified situation of capitalism.