A Yau Ma Tei primary school teacher has been found guilty of having sex with one of his pupils in his bedroom multiple times over a three-year period, starting when she was 12. Chu Chi-wah, 39, was convicted in the High Court yesterday of 11 counts of having sex with a child after a week-long trial during which his defence lawyer challenged the girl's testimony with conflicting evidence. He was acquitted of one count of having sex with a child and one count of intending to induce the pupil to have an abortion. Madam Justice Maggie Poon Man-kay adjourned sentencing to June 8 pending psychological reports on Chu and the victim. Chu shook his head but remained expressionless and calm as the jury delivered its decision. In mitigation, Chu's lawyer, Richard Wong Tat-wah, said Chu did not use violence to make the girl, identified as X, have sex with him. Senior Detective Inspector Robert Lo Chor-wing, of the Yau Ma Tei crime support division who helped investigate the case, warned the public to pay more attention to children and to speak to them if they noticed anything unusual. He said the case had involved a lot of strong emotions but that the verdict was fair. Chu, formerly a teacher at Yaumati Catholic Primary School in Hoi Wang Road, had sex with X from January 2004 to November 2006. The girl is now 17. Chu taught X physical education and mathematics from when she was in Primary Three until Primary Six. When she graduated to secondary school, she signed up for tutorials with him. She went jogging in Aberdeen on Saturdays with Chu and other pupils, after which she would return to his home and stay the night there to save her mother the trouble of picking her up. X said they had sex after the tutorial sessions and the Saturday trips. In a video interview with police, X said that during a 28-month period from the summer of 2004, when she had an abortion, to the end of 2006, she and Chu had sex on average 10 times a month, for a total 280 times. He never used a condom, she said. X claimed Chu took her to a gynaecologist's clinic and paid for her to have an abortion, but the jury cleared Chu of having done so. During the trial, Mr Wong accused X of attempting to recruit one of Chu's other students to accuse Chu of having sex with a minor and identified inconsistencies in her account of events, including the timing of their first sexual encounter.