In 1911, Xu Zhigang (Gou Sheng, Xiaozhi), the son of a Hanyang Iron Works worker, was born in the fire of the Wuchang Uprising. From a child worker who was falsely accused of dropping out of school, to a Northern Expeditionary soldier with the ideals of the Three People's Principles, to a soldier in the Songhu Battle He is an undercover soldier who fights against the enemy side by side with Kong Jiaxin, a female staff officer of the Communist Party. In the smoke of Sihang Warehouse, the lights of Yan'an caves, and the flames of Northeast Steel Furnace, he completes the transformation of his faith from "rooted" to "zhigang". Spanning the Revolution of 1911, the Anti-Japanese War, and the construction of New China, his class rift with his old love Fu Yuecheng and his life and death with his revolutionary partner Kong Jiaxin intertwined into a symphony of personal destiny and the melting pot of the times. When his ashes were integrated into the Hanyang River in 1965, his daughter discovered in the yellowed translation of "How Steel Was Tempered": The son of a Chinese worker had already forged himself into a steel skeleton to support the rejuvenation of the nation, making the oath of "serving the people" immortal in blood and fire.
