The Republic of China National Flag was first used in china in 1917 going onto be made the officaial Republic of China National Flag in 1928.

Symbolicly - White is for "The People's Livelihood, Blue for Democracy & Red for Nationalism

The flag is often referred to in Chinese as Blue Sky, White Sun, and a Wholly Red Earth and is a well-known symbol of the (ROC) & has been based on the island of taiwan since 1949