You are all over the place. You forgot the vital difference between India and china .China as a nation is direct continuity.
ROC inherited the nation from Qing after 1912 revolution.Followed by Communist party overthrow of the ROC party ,which is typical change of gov in civil war.
Qing was always recognized as china,same as ROC,same as PRC.
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Now compare with India.
Did any state recognized any nation called india in 1856? NO!
And this was the state of sub continent before capture by the british.
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Which of them is India?
There would be atleast 4 nation state out of this.
*If buddhism is such a civilizing force why lndians are still uncivilized,not that buddhism shaped china,the poorly educated Indians bs is not fit for outside world.