The flag of Taiwan is a well-known symbol of the Republic of China (ROC). It is commonly referred to in Chinese as Blue Sky, White Sun, and a Wholly Red Earth to reflect its attributes. This design was first used in China by the Kuomintang (KMT) in 1917 and made the official flag of the ROC in 1928. Together, the three colors of flag correspond to the Three Principles of the People: White represents the people's livelihood; Blue represents democracy; and Red represents nationalism. The flag has developed a great deal of additional symbolism due to the unique and controversial political status of Taiwan.