It seems like Kaspersky China is giving away 1 years licence of Kaspersky Antivirus 2013 for free. According to the site, they are currently collecting the user data and will be sending the licence code to the email addresses of the users anytime between May 31 and June 1.
Update : They have started sending out the licence key.
In order to pre-register for the licence code, you need to go to the giveaway page and fill up the fields with appropriate details. Enter your email address on the first field, a Chinese mobile number on the second field and the Captcha on the last field.
Chinese mobile numbers have 11 digits in the format 1xx-xxxx-xxxx. Use any of the three digits mentioned below as prefix and make your own number. For example, using 131 as a prefix, a mobile number would be : 13100000111. (Don't use the same number. Make something up.)
Press the red button once you are done.
If you get to another page (like the one below) then you have submitted the data correctly. Instead, if you receive a message box, then you've either entered incorrect captcha or an incorrect mobile number.
You won't be receiving the licence key immediately.
Once you receive it on your email, download the Simplified Chinese version of Kaspersky Antivirus.
Run the installer after the download completes, then follow the pictures below.
Wait for a while until a window similar to the one below pops out. When it does, enter the licence key that you received on your email.
Now follow the directions mentioned here.
Note : You need to make use of the licence key by July 1.