A former delivery man who claimed he trafficked in $6 million worth of drugs to buy his sick father a kidney dialysis machine was jailed for 14 years yesterday. Yung Chun-fu, 23, admitted dealing in more than six kilograms of heroin and 500 grams of cannabis. In his defence, Yung said he was only in the drug trade to buy his father a dialysis machine and had given most of his money to his family. Yung had only been trafficking for about a month when he was caught, the Court of First Instance heard. Yung turned to crime after losing his job for damaging the company's truck in a traffic accident, the court was told, and had to pay a month's salary - $7,000 - in compensation. When his credit card bill climbed to $20,000, he panicked and 'made a terrible choice', defence barrister David Fitzpatrick said. Yung 'was merely a cog in the wheel rather than the big wheel itself', he said. The court heard Yung agreed to work as a drug courier, earning $2,000 for every delivery and in a month had paid off his credit card. His father, 70, suffered from acute kidney disease, but refused to go to hospital for treatment because 'it was a step too close to death', Mr Fitzpatrick said. But Deputy Judge Gareth Lugar-Mawson said the trafficker's desire to help his father did not mitigate his crime. 'There are many poor families in Hong Kong where young men are thrown out of work and their elderly parents are seriously ill,' he said. He gave Yung credit for his guilty plea and for co-operating with police. Yung was arrested on February 19 when officers seized the heroin and cannabis from a Kwai Chung flat he rented.