Wuhan today is considered the political, economic, financial, commercial, cultural and educational center of Central China.[1] It is a major transportation hub, with dozens of railways, roads and expressways passing through the city and connecting to other major cities.[23] Because of its key role in domestic transportation, Wuhan is sometimes referred to as "the Chicago of China" by foreign sources.[3][4][5] The "Golden Waterway" of the Yangtze River and its largest tributary, the Han River, traverse the urban area and divides Wuhan into the three districts of Wuchang, Hankou and Hanyang.