Wuhan is the capital of Hubei Province, the city's permanent resident population reached 9.78 million in 2010 [2]. The city is the largest one in central China, and an extra clustered city in the middle and lower reaches of Yangtze River. The world's third longest river, the Yangtze River, and its longest tributary, the Han River, run through the urban area of Wuhan, and divides Wuhan into three parts, forming a pattern of tripartite confrontation between Wuchang, Hankou and Hanyang. The Tang Dynasty poet Li Bai wrote such poem: "When jade flute sound lingers at Yellow Crane Tower, plum blossom falls in river city in May", so Wuhan has been called" River City" since ancient time.