A TEENAGER convinced the Court of Appeal to reduce his prison term yesterday enabling him to make an earlier return to a training centre. Mr Justice Mortimer cut 18-year-old Li Chi-lung's jail term from 18 months to one year. Li, representing himself, told the court the sentence imposed by the trial judge was too heavy and the discount offered inadequate. He hoped he could soon return to the training centre where the order was suspended while he was imprisoned. The order was made in September 1994 in relation to burglary and attempted burglary charges. Mr Justice Mortimer told the court the discount of 25 per cent was lower than usually given. Although reports showed Li had a strong criminal disposition and was deeply devoted to triad sub-culture, the training centre was good for him because he could become a useful citizen. 'A long interruption of that process is unlikely to be beneficial [to him],' Mr Justice Mortimer said. Li pleaded guilty to a charge of possession of an offensive weapon in a public place and was sentenced by District Court Judge Sweeney on April 3 this year. The court heard he was arrested with a 30-centimetre beef knife which he said was to be used to attack a triad member to settle scores.