Internet pornography and violent computer games are polluting the minds of the mainland's youth and have ignited a teenage crime wave, CPPCC delegates warned yesterday. The meeting was told the government should adopt stricter controls on illicit material and establish 'wholesome' internet cafes, Xinhua reported. Shang Xiuyun, a judge at Beijing's Haidian district People's Court and a CPPCC delegate, said her court had witnessed a huge increase in juvenile crime, including murder and theft, in the past year. Judge Shang added that she believed the trend was related to the availability of violent and sexual content on the internet. Haidian's Juvenile Court conducted a survey of 100 young offenders and found that more than 75 per cent regularly viewed violent images, while 61 per cent frequently viewed pornographic material. Thirty per cent said they were regular visitors to internet cafes. Xinhua cited the case of a young girl who was raped by three young boys. One of the boys, aged 15, said he had been reading obscene books since he was 10. While all pornographic material and other items deemed 'harmful towards society' are illegal and censored on the mainland, they are easily available through the black market and the internet. A recent survey in Beijing found that 22 per cent of students had visited pornographic websites and 19.6 per cent had engaged in conversations of a sexual nature in internet chat rooms. CPPCC delegate Zhang Xinjian, an official with the Ministry of Culture, said violent computer games had encouraged youngsters to resort to the use of force to resolve disputes.