Break captcha in Chinese

Most captchas are in English/numbers.

Here is an interesting video on how to break captchas in Chinese. The key is this writing recognition site http://www.nciku.com/. This is a nice site to help learning Chinese.

Here the Chinese character is not skewed, so it's easy to draw it. It'll be harder if the characters are skewed.

But ultimately, to make it safer, captcha better incorporate some semantic meaning, like asking for an answer to a question with culture background, instead of just typing the character.