Southern Central Region of China, largely an agricultural area but with considerable industry as well. This area is generally poorer than the coastal provinces and is the main source of migrant labourers for those provinces.
As elsewhere in China, there is an extensive rail network. Rail is the main means of inter-city travel for the Chinese themselves, and many visitors travel that way as well. The system now includes fast bullet trains on most major routes; unless your budget is very tight, these are the best way to go — fast, clean and comfortable.
All the major cities have airports with good domestic connections; some have international connections as well. See the individual city articles for details.
There is also an extensive highway network, much of it very good. Busses go almost anywhere, somewhat cheaper than the trains. See the China article for more. Driving yourself is also possible, but often problematic; see Driving in China.
No visit to Chongqing would be complete without a visit to one of the famous hot pot restaurants throughout the city. A spicy broth with seasonings most westerners have never tasted, diners boil their meats and vegetables in this heavenly stock. Try the pig brain and lotus roots or stick with the beef and potatoes - everything tastes better from a hot pot!