The city is long from north to south and narrow from east to west. The maximum straight-line distance between north and south is about 124 km, the narrowest part is about 19 km, and the widest part is only 55 km. The total area of the city is 5790 square kilometers, including 428 square kilometers in the urban area. Of the total area, the land area accounts for 82.74% and the water area accounts for 17.26%.