The biggest city---Shanghai

Shanghai	Shanghai

Shanghai is China's most comprehensive industrial and commercial city, ranking the first in population and population density. As a tourist city, it attracts travelers from both home and abroad by its commercial activity rather than scenic beauty.
Shanghai is situated on the bank of the Yangtze River Delta, with East River in the east and Hangzhou delta in the south. Housing a population of over 16 million at present, it was once a small town supported by fishing and weaving before the first Opium War. Late in 1990, the central government started developing the area, and has since became the well-known booming metropolis city.  The official language in China is Mandarin but distinct dialects are spoken throughout the country. Shanghainese speak Mandarin or Shanghaihua, however most tourist hotels have staff who are fluent in foreign languages.On talking about the weather in Shanghai ,it is very pleasant. During November to April the coldest and temperatures range between 3.5oC to 13.7oC (38.3oF to 56.7oF). While in May, June, September and October is cooling, ranging between 18.6oC to 23.5oC (65.5oF to 74.3oF). Climate in July and August starts to turn warm and temperature can go up to 28oC (82.4oF).
  Visitors to China must fill out a customs form upon arrival. When you enter the country you are asked to declare electrical goods and luxury items such as cameras, computer equipment etc. Keep this form until you exit to avoid paying duty on goods you brought into the country. There are no restrictions on the amount of foreign currency you can bring into the country. However, one must declare any cash exceeding US$5,000 or the equivalent.