Name: Your Name (What ever you want)
Email: Your email address is your username
Password: Your 126.com account password
Description:
Click Next Button
Hostname: appleimap.126.com
Username: Your email address is your username
Password: Your 126.com account password
Hostname: applesmtp.126.com
Username: Your username
Password: Your 126.com account password
Click Save Button
Use SSL: Yes
Authentication: Password
Server Port: 993
Use SSL: Yes
Authentication: Password
Server Port: 465
You can login 126.com and Signup for 126.com new account on your iPhone from here.