THE Korean national flag is called'T'aegukki' - a name derived from the t'aeguk circle depicted in the centre. The circle is perfectly balanced with the red upper circle representing the yang and the blue lower section symbolising the yin. According to traditional Oriental philosophy, the two represent great cosmic forces which oppose each other but achieve perfect harmony. The t'aeguk circle represents the eternal principle that everything in the universe is created and develops through interaction between yin and yang. Four trigrams surrounding the circle denote the process of yin and yang developing through a spiral of change and growth. The white background, meanwhile, symbolises purity. It also indicates that the Korean nation is peace-loving.