*Username:
* Username is required.
* 1-20 characters allowed, including letters(A-Z, a-z), digits(0-9), and underscores(_)，and must include letters.
* Username already exists.
*Password:
* Password is required.
Password must be minimum 8 digits and maximum 16 digits with the combination of character, number and special character.
*Confirm Password:
* Confirm is required.
*Confirm password and password are not the same.
*Email:
* Email is required.
* Please enter the correct email,less than 64 characters.
* The email already exists.
*Verification Code: