This was the national flag of China under the Qing Dynasty. Yellow is actually the national colour of China. And dragon the national animal? This is actually a one-size-fits-all solution for every possible regime. However, yellow is the colour of the Chinese emperor, which is disliked by the republic regimes. This is one from the tradition.
The orginal flag of Republic of China until 1928 tells the story of an harmonious society built up with the five major ethnics, namely the Han, Manchu, Tibetan, Hui and Mongol. This is one for the people.
This is the well-known national flag of the historical Republic of China from 1928 to 1949 and the current Republic of China on Taiwan. The blue sky white sun is the symbol of KMT. It is definitely the best-looking one in terms of the design and favoured by many pro-democracy activists in China.
This flag is a typical communist design....One can argue that red is the colour of happiness in China. But we're taught that this piece of flag was dyed by the blood of the matyrs who died in the revolution. A western, European, and communist Russian description. I like the design when it's put on an adidas or Li-Ning court jacket, not as it is spread in an 2-dimension way.
And there were times when more flags were showing up together. Activists from Hong Kong and Taiwan brought these two flags onto the disputed Senkaku Islands (钓鱼岛) in 1996 representing a Chinese nationalist point of view. It was a quite moving moment. After that they were arrested by Japanese troops....