Heihe–Tengchong Line

Common card · No. 333764

The Heihe–Tengchong Line (simplified Chinese: 黑河–腾冲线; traditional Chinese: 黑河–騰衝線; pinyin: Hēihé–Téngchōng xiàn), also called the Aihui–Tengchong Line and internationally as the Hu Huanyong line or Hu line, is an imaginary line coined by Chinese demographer Hu Huanyong (1901–1998) that divides China into two portions with contrasting population densities and climates. It stretches diagonally across China from the prefectural city of Heihe, Heilongjiang province in the northeast to Tengchong, Yunnan province in the southwest. The eastern portion (area shown in red on the map) is further subdivided into northern and southern halves by the Qinling–Huaihe Line. As of 2015, the eastern portion constitutes 43% of the total territory but has 94% of the country's population; while the western portion constitutes 57% of the total territory but has only 6% of the country's population. The line also approximates partly with the 400 mm (16 in) annual total rainfall isohyetal line proposed by historian...

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