Chengdu, formerly romanized as Chengtu, is the provincial capital of Sichuan province in Southwest China, as well as a major city in Western China. It holds sub-provincial administrative status. The administrative area houses 14,047,625 inhabitants: 7,415,590 within the municipality's nine urban districts and 6,632,035 in the surrounding satellite towns and counties' urban, suburb and rural area. According to the 2010 census, Chengdu is the fourth most populous city in China. Chengdu is one of the most important economic, finance, commerce, culture, transportation, and communication centers in Western China. Chengdu Shuangliu International Airport is one of the top 50 busiest airports in the world, and Chengdu Railway Station is one of the six biggest train stations in China. According to the 2007 Public Appraisal for Best Chinese Cities for Investment, Chengdu was chosen as one of the top ten cities to invest in out of a total of 280 urban centers in China. Chengdu is also popular in international company and consulates.More than 250 Fortune 500 companies and 10 consulates have established branches in Chengdu due to huge demand of Western China. In 2006, it was named China's 4th-most livable city by China Daily.