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).
After a full investigation, on, April 18th, 2009, it was announced that the length of the Great Wall of Ming Dynasty was 8,851.8 km (5,500miles). The wall extends from Hushan Great wall in Liaoning Province to the Jayuguan Pass in Gansu Province. The section of Great Wall in Beijing is about 550km long.