Shanghai encompasses 6,340 square kilometers, or which the Xin Pudong Area takes up 522 square kilometers. Within the area there are four key small zones. The city is China’s second-largest one in terms of population and is one of the four Tianjing, and Chongqing. It is also one of China’s most important industrial and cultural centers. To most foreigners, Shanghai used to be the adventurers’ paradise. Most of the European-style quarters of the Old International Settlement and the French Concession areas can still be seen, though they are much in need of repair.