After validating an IDN (Internationalized Domain Names), Verisign executes some further logic based on the Language Tag of the registration.
Certain characters in Chinese have the same meaning and pronunciation, but are visually different. These characters are called character variants. For a more detailed description of character variants click here.
When a domain is registered with a Chinese character that has variants, then all other variants for that Chinese character will be prohibited from registration. For a list of Chinese characters with variants, click here. (~ 5.5 MB)