Australian Aboriginals would disagree...
"It is generally held that they originally came from Asia via insular Southeast Asia and have been in Australia for at least 45,000–50,000 years." https://www.britannica.com/topic/Australian-Aboriginal
Historians usually say China's first dynasty is the Qin. The Qin were hated and were quickly replaced by the Han who lasted until approximately the year 200 AD. The Chinese people proudly refer to themselves as "Han".
When the Han dynasty fell, there was a long period of confusion until the founding of the Sui dynasty approximately in the year 600 AD. The Sui built the grand canal which was used to transport rice harvests from the South to North. The Sui were hated and were quickly replaced by Tang and later by the Song. Most Chinese people think of Tang and the Song were China's golden age.
What is interesting and sparks debate is what happened afterwards. The Song dynasty fell approximately in the year 1100 after a series of "barbarian" conquests. There was the Khitan Liao who ruled northern China and who were related to proto-Mongols. There was the Jin took much of the Khitan's territory and who were related to the Jurchen/Manchu. And the Mongols who conquered the Khitan, the Jin, and Song. This turbulent era was the backdrop to one of China's classical novels "Water Margin" aka "All Men are Brothers" and tells the fictional tale of Song patriots fighting against their own government in an effort to repel the steppe "barbarians". A more modern novel based on this setting is the "Condor Heroes" which features a backstory of the Mongols, the Jin Jurchens, and the Song.
After the Mongols were repulsed by the Ming dynasty, the Ming dynasty eventually fell to the Manchu who were another "barbarian" peoples. The Manchu lasted until the modern era. There are those who claim the Manchu adopted Han culture and should be considered Han. Some modern scholars who read the actual Manchu records in the actual Manchu language (not the Mandarin transcript) said the Manchu never considered themselves Han but actually the rulers of five different peoples: Manchu, Han, Tibet, Mongol, and Uighur.
so it means their called chinese civilization simply because they happened in the same geographic area at different times, but they could as well be regarded different civilizations...like no one is calling all the civilizations in Egypt egyptian civilization and saying it has longevity through millennia till the present
