All Nanjing smoke except Jiangsu Red Nanjing, Purple Nanjing, Yellow Nanjing and Green Nanjing cannot be purchased in other provinces. Jiangsu's inter-provincial land boundary is 3,383 kilometers, covering an area of ??107,200 square kilometers, accounting for 1.12% of China's total. The per capita land area is the smallest among all provinces and regions in China. Jiangsu's terrain is dominated by plains, which cover an area of ??more than 70,000 square kilometers, accounting for more than 70% of Jiangsu's area, ranking first among all provinces in China. In 2014, Jiangsu's permanent population reached 79.6006 million, ranking fifth in China. In 2014, the GDP of 13 cities in Jiangsu all entered the top 100 in China, with per capita GDP reaching 81,874 yuan, ranking first among all provinces in China.