Cohorts in Marketing. Similar to demographics, cohorts use quantifiable descriptors to identify target markets. Demographics, however, are the quantifiable descriptors themselves, such as the aforementioned age and household income.
The highest peaks are over 2,000 m (6,600 ft). Beijing Municipality consists of six city districts (previously eight, see Xuanwu and Chongwen), eight suburban districts and two rural counties. It covers a total area of 16,807.8 km2 (6,489.5 sq mi).
The city is 39% flat land and the other 61% is quite mountainous area. Beijing is surrounded by the Yanshan Mountains on the west, north and east while the small alluvial plain of the YongdingRiver lies to its southeast. Beijing faces the Bohai Sea, and the area is also called the Beijing Bay.