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At the end of the Qing Dynasty and the beginning of the Republic of China, the journey of youth revolves around Cheng Lu and Duan Yunye, based on the rise and fall of shipping in Jiangsu and Zhejiang and the training and growth of the sons of warlords.

A girl from the far west and a boy from the northeast, when they represent two state-owned enterprises, China Communications Construction Company and China Mobile, meet in the blue sea of the south, from the expansion of Tianjin Port to the reclamation of Chongming Island, from the construction of Zhoushan New Port to the infrastructure construction of the South China Sea, state-owned enterprises have always stood for the needs of the country. On the front line, they are not afraid of difficulties and do not care about gains and losses. They do everything for the benefit of the people and the country. They pass on this "state-owned enterprise responsibility" to every employee. Their silent dedication has brought about the country's well-known reputation as "infrastructure maniacs".