A MAN who was released on police bail after being arrested for a drug offence was caught two hours later with a fresh supply of heroin, the High Court heard yesterday. Yeung Chi-wing, a drug addict since the age of 15, was again given bail pending trial, but was caught six months later with more drugs, the court was told. Jailing him for a total of 15 years, Deputy Judge Wong said that by being a courier, Yeung's role was just as serious as the man behind him, because without a courier the illegal trade could not flourish. While Chan was caught red-handed on all offences, he would still be given credit for his guilty plea, the judge said. Yeung, 37, had pleaded guilty before a magistrate to two counts of trafficking in a dangerous drug and was committed to the High Court for sentence. He also pleaded guilty to another similar offence yesterday before the judge, who agreed to deal with both cases at the same time. Crown Counsel Alan Lucas told the court that Yeung was stopped by police on October 19 last year in Shamshuipo. He admitted having two packets of ''white powder'', which when analysed was found to be 55 grams of a heroin mixture. He was granted police bail and allowed to leave that evening. But just over two hours later he was seen coming out of a Shamshuipo building and when stopped by police he was discovered to be carrying an envelope containing 120 grams of a similar drug mixture. The court heard that Yeung was again given bail pending trial. Then on April 21 this year, police officers raided premises on Prince Edward Road and saw Yeung climbing out of a window. His escape was foiled by policemen stationed on the ground floor. A total of 684 grams of heroin mixture, with a retail value of $246,415, were found on him, in a flat and on a canopy of the building. Yeung's counsel, Robert Forrest, said his client was a heavy drug addict and the temptation of a ready supply of drugs, in return for acting as courier and storekeeper, was impossible to resist.