China looks like a block on the map. Inside the block runs a line geographers have traced since 1935: cities to the east of it, space to the west.
In 1935 Hu Huanyong drew a straight line from Heihe on the Amur to Tengchong in Yunnan. About 94 percent of the population then lived east of it, on just over 40 percent of the area. Later counts have shifted the ratio. They have not made the line meaningless.
China at a glance
Capital
Beijing
Area
9,706,961 km²
Population
1.41 billion
Official language(s)
Chinese
Currency
Renminbi
Continent
Asia
Distinctive fact
The Hu Line divides the country
Fourteen neighbours, one clock
China has 14 land neighbours, as many as Russia. The area is 9,706,961 square kilometres, the population 1.41 billion. The country runs from the Pacific coast to Central Asia. One time zone still covers the whole state. In Kashgar the sun rises when the morning in Beijing is already well along.
The single clock and the Hu Line belong together. Both are decisions to treat a very large country as one. Geography does not contradict that. It only forces the costs into view: long distances, different languages, different altitudes.
The line is not a wall. It is a description that still holds.
— TerraTally · Countries desk
The west is thinner, not empty
Xinjiang, Tibet, Qinghai and Inner Mongolia lie largely west of the line. Uyghurs, Tibetans, Mongols and Han live there. The space is inhabited and contested. Tell it as empty ground and people become a backdrop.
East of the line lie the North China Plain, the Yangtze basin and the coast. That is where the megacities sit. The Hu Line explains why density is so uneven. It does not explain who holds power there.
One written language, many spoken ones
Standard Chinese is the official language. Cantonese, Wu, Min and other Sinitic languages are different languages in daily speech, even when they can read the same character. Add Tibetan, Uyghur, Mongolian, Zhuang. The state has imposed a shared script. It has not unified the tongues.
Beijing sits east of the line, on the North China Plain, not at the geographic centre. The centre would be nearer Xi'an or farther west still. The state put its capital where the people already were, not where the area is largest. That repeats the pattern of other large countries, only at a different scale.
China is easy to draw as a block and unintelligible without the line inside. Almost everyone lives east of it. The west remains part of the state, not its leftover.