The play is based on Wang Yili's novel of the same name. It tells the story of the rise and fall of the "No.13 Telecom Factory in Luzhong" which is surrounded by green hills and has difficult conditions for more than 20 years. A group of young people, represented by Hong Yuanshan, Gong, Zuo Hongwei, based on their posts, devoted their lives to the construction of national communications, and also found themselves and sublimated their feelings in love, friendship and affection.
At the beginning of 1973, the third-line construction was in full swing. Deep in the mountains of a northern province, a number of new employees were welcomed after the expansion of the small third-line factory code-named "748". Lu Xiaoqing, Zuo Hongwei, Ding Yaling, Li and Zhao Cungen, who are in their prime of life, are outstanding among these apprentices, both in appearance and work ability.
From youth to late spring, Lu Xiaoqing dedicated the best time and youth in his life to the "748" factory, witnessing its glory, decline and rebirth until he retired from the historical stage.