The hack, considered the biggest in China's Internet history, occurred on December 21 when personal information of over 6 million users of the China Software Developer Network was exposed on the Internet for free downloading.
The hacker detained on charges of illegal acquisition of computer data, committed the crimes in December. Beijing News reported
Police said the leaked information contained user IDs, passwords and e-mail addresses in clear text. The leak had a rippling effect on other websites, including online shopping, gaming, social networking and even financial service websites.
He admitted to hacking into the CSDN server in April 2010 through a system loophole and sneaking into an online recharge platform and a stock brokerage system.