Beijing is a city.
Beijing . As a city combining both modern and traditional architecture , Beijing is an ever-changing megacity rich in history but also truly modern , exemplified in its global influence in politics , business & economy , education , history , culture , language , music , sporting , architecture , civilization , fashion , art , entertainment , innovation and technology . Beijing was the largest city in the world by population for much of the second millennium A.D. . According to the 2016 InterNations Expat Insider Survey , Beijing ranked first in Asia in the subcategory `` Personal Finance Index , '' a measure of expats ' salaries versus cost of living in the city .