The city was incorporated in 1900 . 3,423/km 2  (8,870/sq mi) is the density of inhabitents in  the urban region of UNESCO World Heritage Site . The land area of the city is 225.73 sq km  (87.15 sq mi) . The city province is Razavi Khorasan . (+213) 021 is the area code of UNESCO World Heritage Site . Zhang Guoqing is the mayor of UNESCO World Heritage Site . UNESCO World Heritage Site is located in People's Republic of China . The UNESCO World Heritage Site citys' lowest elevation is 2,838 ft . UNESCO World Heritage Site is at an elevation of 381 m . The coordinates of the city are 35°52′N 128°36′E﻿ / ﻿35.867°N 128.600°E . The UNESCO World Heritage Site city highest elevation is 424 m (1,391 ft) . UNESCO World Heritage Site has Population: 2,698,077  population . The urban region is 9,014.3 sq mi (3,843.8 sq km) in area . The postal code of the city is 090101 to 090158 . 1,500/km 2  (3,900/sq mi) is the density of people in  the metro region of UNESCO World Heritage Site . The city water area is 4.12 sq mi (10.67 km 2 )
UNESCO World Heritage Site is below the equator