A SCAFFOLDING worker found trafficking in 2.3 kilograms of heroin mixture was yesterday sentenced to 15 years' jail by the High Court. Mr Justice Duffy, passing sentence, said that from the moment of his arrest, Li Chun-ming had admitted his guilt and had been willing to help the authorities track down other dealers. It was evidence that he was remorseful for getting involved in this dreadful trade, the judge said. Li, 34, pleaded guilty to two counts of trafficking in a dangerous drug. Senior Crown Counsel Francis Lo told the court Li was seen coming out of a Mongkok flat on March 25 by police officers. He was stopped and more than one kilogram of a heroin mixture was found on him. Police raided the flat where 1.3 kg of a similar drug was seized with heroin packaging equipment. Li's counsel, Eric Kwok, said his client needed money to support his pregnant wife and to pay his father's medical expenses. He had to borrow $30,000 from a Mr Yau, who asked him to work as a heroin delivery boy.