China, like the old USSR, is a multinational empire held together, in theory, by a shared ideology. OTOH, it is not quite so multinational as the Soviet Union was; its core Han-Chinese population is much larger relative to non-Han minorities (91.9% of the total population – http://en.wikipedia.org/wiki/People’s_Republic_of_China#Demographics) than the USSR’s non-Russian population was relative to non-Russian minorities (50.78% – http://en.wikipedia.org/wiki/Soviet_union#Demographics_and_society; and it has been much more successful in Sinicizing its minority regions than the USSR was in Russianizing its minority regions. The state policy of colonizing non-Han territories with Han (we might call this “ethnic swamping” as opposed to “ethnic cleansing”) has produced a situation where some of the historically non-Han territories now have a very substantial Han minority and most have a Han majority:
Gansu Province: 91% Han, 5% Hui, 2% Dongxiang, 2% Tibetan – http://en.wikipedia.org/wiki/Gansu
Guangxi Autonomous Region: 62% Han, 32% Zhuang, 3% Yao, 1% Miao – http://en.wikipedia.org/wiki/Guangxi
Guizhou Province: 62% Han, 12% Miao, 8% Buyi, several smaller nationalities – http://en.wikipedia.org/wiki/Guizhou
Inner Mongolia Autonomous Region: 79% Han, 17% Mongol, 2% Manchu – http://en.wikipedia.org/wiki/Inner_Mongolia
Historic Manchuria:
Heilongjiang Province: 95% Han, 3% Manchu, 1% Korean – http://en.wikipedia.org/wiki/Heilongjiang
Jilin Province: 91% Han, 4% Manchu, 4% Korean – http://en.wikipedia.org/wiki/Jilin
Liaoning Province: 84% Han, 13% Manchu, 2% Mongol – http://en.wikipedia.org/wiki/Liaoning
Ningxia Autonomous Region: 79% Han, 20% Hui – http://en.wikipedia.org/wiki/Ningxia
Qinghai Province: 54% Han, 23% Tibetan, 16% Hui, 4% Tu – http://en.wikipedia.org/wiki/Qinghai
Tibet Autonomous Region: 93% Tibetan, 6% Han – http://en.wikipedia.org/wiki/Tibet_Autonomous_Region
Xinjiang Autonomous Region: 45% Uyghur, 41% Han, 7% Kazakh, 5% Hui – http://en.wikipedia.org/wiki/Xinjiang
Yunnan Province: 67% Han, 11% Yi, several smaller nationalities – http://en.wikipedia.org/wiki/Yunnan
Give this status quo, do any non-Han secessionists but those of Tibet have even a Chinaman’s chance? I mean, if you held a genuinely democratic referendum on the status of Inner Mongolia, wouldn’t the Han majority vote against independence?