Tianjin is the largest coastal city in northern China. In terms of urban population, Tianjin is the fourth largest in China, after Shanghai, Beijing, and Guangzhou. In terms of administrative area population, Tianjin ranks fifth in Mainland China. The walled city of Tianjin was built in 1404. As a treaty port since 1860, Tianjin has been a major seaport and gateway to Beijing. During the Boxer Rebellion the city was the seat of the Tianjin Provisional Government. Under the Qing dynasty and the Republic of China, Tianjin became one of the largest cities in the region. At that time, numerous European-style
China successfully docked with Tiangong-2 on 19 October 2016. China currently has the largest number of active cellphones of any country in the world, with over 1 billion users by February 2012. It also has the world's largest number of internet and broadband users, with over 688 million internet users , equivalent to around half of its population. The national average broadband connection speed is 9.46 Mbit/s, ranking China 91st in the world in terms of internet speed. , China accounts for 24% of the world's internet-connected devices. Since 2011 China is the nation with the most installed telecommunication bandwidth in