Calgary, also known as Calgary, the fourth largest city in Canada, is located in the Rocky Mountains in the south of Alberta, Canada, with an area of 789.9 square kilometers and an altitude of about 1048 meters. It is the economic, financial and cultural center of Alberta. The word Calgary means "clear water".

It used to be a pasture, but oil and natural gas were discovered in the 20th century, and the economy developed rapidly. Many oil companies (PetroChina, Sinopec and CNOOC) in the world, including China, have permanent offices here, and many energy companies have Canadian headquarters here, so Calgary is the energy center of Canada and the second largest energy center in North America. Calgary ranks first among the top 500 companies in the world.

The urban population of Calgary is 1, 195, 194 (20 14), and the metropolitan population is 1, 406,721(2014. Calgary is the city with the highest density of engineers in Canada and has been rated as "the cleanest city in the world" for many times. 1988 15 The Winter Olympics was held here. Calgary was named the fifth most livable city in the world by The Economist from 20 12 to 20 14.