It often rains at night in late spring and early summer, and thus the city is famous for its "night rain in the Ba Mountains", as described by poems throughout Chinese history including the famous Written on a Rainy Night-A Letter to the North by Li Shangyin.[41] The municipality reaches a maximum width of 470 km (290 mi) from east to west, and a maximum length of 450 km (280 mi) from north to south.[42] It borders the following provinces: Hubei in the east, Hunan in the southeast, Guizhou in the south, Sichuan in the west and northwest, and Shaanxi to the north in its northeast corner.[43]