The stage feature is from 1840 to 1860, which is the first stage of the development of the old democratic revolution. Its stage feature is that China began to become a semi-colonial and semi-feudal society, which is reflected in all aspects of China society from economic base to superstructure. (1) Economically, the natural economy gradually disintegrated, and the foreign capitalist economic power became stronger and stronger, and China began to become a vassal of the capitalist world market. (2) Politically, due to the failure of the two Opium Wars, China lost a lot of sovereignty; The accumulation of contradictions contributed to the outbreak of the peasant revolutionary movement in the Taiping Heavenly Kingdom with the characteristics of the times. (3) Ideologically, with the germination of "new thoughts", China people have a new understanding of the West.

(1860- 190 1 year) The formation of semi-colonial and semi-feudal society in China (1860- 190 1 year).

The stage feature is the second stage of the development of the old democratic revolution from 65438 to the beginning of the 20th century. The stage feature of this 40-year history is the complete formation of semi-colonial feudal society in China.