The flag of Mongolia is a vertical tricolor with a red stripe at each side and a blue stripe in the middle, with the Mongolian Soyombo symbol centering on the leftmost stripe. The blue stripe represents the eternal blue sky, and the red stripes thriving for eternity. The Soyombo symbol is a geometric abstraction that represents fire, sun, moon, earth, water, and a Taijitu symbol representing the duality of yin and yang.
The twelve rays of the white Sun symbolize the twelve months and the twelve traditional shichen (時辰; shíchén), a traditional unit of time which corresponds to two modern hours. Sun Yat-sen added the “Red Earth” to the flag to signify the blood of the revolutionaries who sacrificed themselves in order to overthrow the Qing Dynasty and create the ROC. Together, the three colors of the flag correspond to the Three Principles of the People: Blue represents nationalism and liberty; White represents democracy and equality; and Red represents the people’s livelihood and fraternity. President Chiang Kai-shek proclaimed on the National Day in 1929, “As long as a national flag with Blue Sky, White Sun, and a Wholly Red Earth flies on the land of China, it symbolises the independence and liberty of the descendants of the Huang Emperor”.