1. There was no nation state in early days, it was either Kingdom or group of kingdoms.
2. China(communist) use history according to there convenience, They take the Map of some random dynasty and claim Tibet and China.
3. Chinese claims are just like, Italy take old Roman Map and claim Britain to be parts of it, or India take old Mauryan Map and claim indomasia to Afghanistan.
Correct, what if Mongolia claim China as part of Greater Mongolian Republic. There was a time when Mongols captured part of china, Mongols too can claim the way chinese claim.
Who doesn't use their history according to their convenience, what happened to Goa?
Tibet has been ruling and be part of the central government since the Qing Dynasty. The monks and the nobilities betrayed their country, the government made the action of counterinsurgency, which is absolutely reasonable in any countries.
Does the Republic of Italy even inherit a single sovereignty from the Roman Empire?
The Yuan Dynasty inherited from Song, Jing and other nations. The Ming Dynasty inherited from Yuan, the Qing Dynastry ingerited from Northern Yuan and Qing. The Republic was inherited from the Qing Empire. Simply as that.
Besides China used to own lands from Korea, Vietnam, Myanmar, Kazakhstan etc, why doesn't the Chinese government claim them all, think about it.
Greece was even opposed to the name of Macedonia is used by the "Republic of Macedonia"
Based on what conditions can Modern Mongolia makes should a claim?
As I mentioned before,
1. China was never a part of Outer Mongolia, but Outer Mongolia was part of Modern China;
2. Outer Mongolian are not even the posterity of Genghis Khan, yet Inner Mongolian (Golden Family) are.
3. The cradle of Mongolian, Hulun Buir, belongs to China.
Based on your logic, the Republic of Macedonia should claims Greece as part of Greater Macedonia Republic.
Also if Pakistan changes their name to Mughal, Pakistani can claim the whole India.
Interesting definition. Basically the $1ml question is: where China begins, and where it ends?
Sure, the Viets are not Han´s.
As I said, the concept of China (中國, the Middle Kingdom/Land) was firstly appeared thousands year ago,
but "China" was never used as an official name of a signal nation until the Republic was formed.