How do u know i am a Chinese my email address or IP or anything else
Because of your accent
Joking apart, the screenshot you attached clearly indicate your Windows is configured with a Chinese codepage, so I used the same, supposed, configuration, and got the same problem you reported. This don't tell you are Chinese, and I don't tell that either in my reply.
Even so, digging a little more, you posted from a Hong Kong IP, the username you used can be tracked to some Chinese forums, the email address you entered is yahoo.com.hk and pops up also in a Chinese Facebook page.
Even so, all this don't tell you are Chinese, but if I have to bet...