You must differentiate Han from China, how do you define Chinese? We are sinicized into one indentity and civilization, inner Mongolia speak Mandarin now and Manchurian now fully absorb into our nation, we claim what was China at the end of Qing. The land was never disputed Treaty of Aigun was signed in the 1600s,and the Russians took advantage of our weakness to invade. READ HISTORY! STOP BEING SLAVES. We might have lost our imperial rule in 1644 but our culture and civilization lived on even assimilating the Manchurian, you lil Viets are nothing but sinicized Khmers, we gave you an identity you lil ingrates else you would live on treetops and won't know how to write.north china was not land of China, there was native land of Manchurian, is disputed with Russian in the past before thay invaded and ruled China as Manqing dynstry. In WW II Manchu Guo created by Japan, Japan helped Manchuguo in the war with Soviet Union. Soviet is P5, has taken back Vladivostock from Manchu Quo, Chinese don't have right to talk about it. So why China Gov is silent up to now.
Civilisation state ? very funny. you were slaves of Mongolian and Manchrian until 1912.