Learning how to type Bopomofo

I published my first typing practicing site.

Have you ever seen characters like these ㄅㄆㄇㄈ called Bopomofo?

Well, this is a unique in Taiwan and I have been thinking to learn Chinese with these for a few years.

However there are not so many site I can learn typing Bopomofo, So I built it by my self.

The page is pretty simple, but it already has complete typing interface of them.

Try to play around!