On what was Sun Yat-sen's version of Chinese nationhood based?

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Sun Yat-sen's version of Chinese nationhood was based on Han Chinese nationalism, which emphasized the unique cultural and historical identity of the Han people as the basis for a unified Chinese nation. This concept was rooted in the idea of a shared cultural heritage and a sense of common identity among Han Chinese people, and was used as a rallying point for political reform and national unification.

On What Was Sun Yat-Sen's Version of Chinese Nationhood Based