1. Chinese (the official language) is an invention [1].
The article explains its title with the history and development of different language families and dialects in China.
2. The Han race (the identity) is an invention. The united Chinese history (the view point of uninterrupted dynastic civilization) is an invention [2].
> ... the Han race was really only constructed in the last 100 years, along with the national mythos of several millennia of uninterrupted dynastic civilization.
3. An ethnically integrated China (the identity and political system) is an invention. The Chinese nationalism (the ideology) is an invention.
> an ethnically integrated China is, in fact, a modern invention linked to the rise of nationalism at the end of the nineteenth century.
4. The invention of an integrated China is sensible, because history [3].
> This idea is a very sensible one in the context of China being forced to open up to the world.
5. The invention of an integrated China is NOT sensible, because history [4].
> Mao Zedong supported the Hunan self-government movement even as late as the 1920’s.
[1]: https://www.historytoday.com/archive/feature/invention-chine... "The Invention of Chinese"
[2]: https://news.ycombinator.com/item?id=29529921
[3]: https://news.ycombinator.com/item?id=29525040
[4]: https://news.ycombinator.com/item?id=29525343
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Clear thinking of different concepts, and understanding what is being discussed, is needed for a fruitful discussion.
Calling unfamiliar concepts as “a debate of definition of words”, and not understanding what is being discussed, is not fruitful for discussion.
Note that throughout the discussion, we are using “invention”, “construction”, or “convention” as the same concept, and study their consequences to the society, to politics, and to history.
Here, we are talking about created languages (Chinese official language), identity (Han), history (national mythos, narratives), ideology (nationalism), and politics (integrated China).
This branch of social science, which studies created and accepted concepts, deals with “social constructs” [5].
[5]: https://en.wikipedia.org/wiki/Social_constructionism "Social constructionism"