who is dr sun yat sen?
Sun Yat-sen (/ˈsʌn ˌjætˈsɛn/; born Sun Wen; 12 November 1866 – 12 March 1925) was a Chinese philosopher, physician, and politician, who served as the provisional first president of the Republic of China and the first leader of the Kuomintang (Nationalist Party of China).