How Steel Was Tempered was a Soviet novel about the struggles and revolutions of the Soviet steel workers in the 1920s. Plot clues included: 1. The growth of the protagonist, Pavel Kochagin. He gradually became an excellent steel worker and leader through hard work and self-learning in a difficult working environment. 2. The changes in the social and economic situation of the Soviet Union and the development of industrialization made the steel industry an important industry. At the same time, it also brought about the oppression and exploitation of the working class. The rise of revolution and struggle gradually awakened and strengthened the steel workers in the struggle, and finally achieved the victory of the revolution. Khrushchev played an important role in the novel. He represented the interests of the capitalist class in the Soviet Union at that time and had a profound impact on the development of the revolution and society. Through the growth of the protagonist, Kochagin, How Steel was Tempered portrayed the image and historical background of the Soviet Union in the process of industrialization and revolution, and also revealed the nature and contradictions of capitalist society.