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 in the Vietnam War 1962, even exceeded Soviet assistance in the same period. Thus, all these factors contributed to a closer relationship and increased the Chinese popularity among the Vietnamese population. Besides, when it comes to the reason why did the leaders in Hanoi, shortly after such a strong declaration of alliance with the Chinese, turn away from Beijing and towards Moscow, he suggests, the most important reason was the deteriorating security situation in Vietnam. From Vietnamese perspectives, in terms of the threat of escalating US intervention, the only possible and reliable ally in such a situation would be the Soviet Union. Although China