this looks exactly like the royal airforce roundel [/quote]
That’s another reason why it works. There are many good design principles, but the number of solutions is finite, not infinite.[/quote]
I think a big circle in the middle is a good design principle.Tricolor and Nordic Cross are some of my favorites as well,but it’d be kinda out of place for Taiwan.
Another great design that I can think of is Canada’s flag,but the centric emblem is a problem.[/quote]
This kind of emblem is of European heritage. Even the leaf was already a part of the previous version of the Canadian red ensign.
The concentric circles in the classic white, blue and red colours is so easy to understand and so symbolic that it just works! There is NO chance of sending any wrong message.