The ancestors of the Zheng family were abandoned in Longmen Town among the high mountains due to war, and discovered that the salt necessary for human survival was hidden underground. After excavation and mining, as well as war and economic turbulence, population proliferation, and the unremitting efforts of generations of people, Longmen Town finally became a major salt chemical industry town. At the same time, a large number of dinosaur skeleton fossils were unearthed. However, the development of civilization is a double-edged sword, followed by environmental pollution and ecological deterioration. The Zheng family, which has been struggling for several generations, is like a passer-by, and its descendants have left Longmen Town. Longmen Town seems to have become a lonely, inn...