The completion and opening to traffic of Lin Lan Expressway has shortened the driving time from Lanzhou, the provincial capital, to Lintao to one hour, which means that Lanzhou citizens living in a noisy city can smell the fragrance of Dahlia, gladiolus or purple peony from Lintao, the "back garden", as long as they drive for one hour. The completion and opening to traffic of Lin Lan Expressway is of great significance for alleviating the traffic congestion of Lanzhou South Exit Highway, giving full play to the role of Lanzhou as a central city and promoting the economic and social progress of the whole province.