What kind of hardships did Paul Kochagin experience in How Steel Was Tempered and what did he finally achieve?

How Steel Was Tempered was a novel by Ostrovsky of the Soviet Union. It described the setbacks and tribulations that Pavel Kochagin experienced in his youth as well as his struggle and growth in the industrial revolution. Pavel Kochagin experienced many hardships, including family poverty, childhood abuse, physical disability, etc. He had been a factory worker, a squad leader, a technical expert, and had also experienced political movements and wars. However, he never gave up his pursuit of knowledge and belief in ideals. Through continuous learning and practice, he gradually became an excellent engineer and revolutionary. In the end, Pavel Kochagin played an important role in the struggle of the Soviet revolution and became the leader of the revolutionary class and a famous engineer. He experienced many hardships and difficulties, but finally succeeded and made an important contribution to the Soviet Union's industrial construction. At the same time, he also used his own experience and struggle to inspire the growth and struggle of a generation to become a figure with lofty value and historical significance.