Flag of the Republic of China

The flag of the Republic of China, commonly called the flag of Taiwan, consists of a red field with a blue canton bearing a white disk surrounded by twelve triangles; said symbols symbolize the sun and rays of light emanating from it, respectively. The flag was originally designed by the anti-Qing group, the Revive China Society, in 1895 with the addition of the red field component in 1906 by Sun Yat-sen in his speech.

Source: Wikipedia — Flag of the Republic of China (CC BY-SA 4.0)