Search engine Google is likely to have its growth in China curtailed after authorities accused it of allowing access to pornography. But the pornography claim is more than likely a pretext for dampening internet freedom, according to Professor Feng Chongyi from University of Technology Sydney. "Curbing pornography is not the Government's main concern: its main concern is political," Feng remarked in an interview with ABC Radio Australia's Connect Asia program. "The Chinese Government has a tight grip on the internet. It's the only country in the world where internet use is growing but freedom on the internet is being reduced." Google's China version accounts for about a third of the Chinese search engine market, but was allowed only when it agreed to censor content according to the Chinese government's regulations, which are so complex the system has been nicknamed the 'Great Firewall of China'. Government authorities ordered Google China to disable some of its functions and block access to overseas websites.