The Kuomintang made Nanjing the capital because it was located in Nanjing when the Republic of China was founded. When the Republic of China was founded, the rule of the Manchu government was not over, so it was natural that it would not establish its capital in Beijing. Besides, Sun Yat-sen had the slogan of "expelling Tatars and restoring China" at that time, and he would not build his capital in the capital of the Qing Dynasty. It is also understandable that the Republic of China was established in Nanjing, the capital of Emperor Hongwu who restored China.
Nanjing also has its historical and geographical reasons. The natural barrier of the Yangtze River is also the reason for the ancient capital of the Six Dynasties.
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