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).
In this area, the regular way of building a double-sided wall is impossible. The lofty peaks serve as natural barriers on the other side. The height varies according to the terrain, often measuring 2-3.5 meters (6.6-11.5 feet) tall. A famous and steep single wall is located at Simatai Great Wall in Beijing.