A CLEANING worker, found in possession of more than 300 grams of heroin mixture while facing trial for a similar offence, was yesterday jailed for nine years. Passing sentence on Ho Chi-wing in the High Court, Deputy Judge Pang said the guilty plea was the only mitigating factor. Drug addict Ho, 41, was charged with a total of three counts of trafficking in dangerous drugs, in two separate cases which were dealt with together. Crown counsel Jim Dick told the court the first case occurred on July 4 last year. Ho was stopped by police in Wan Chai and several small packs of heroin mixture were found on him. More drugs were later seized from his North Point home. He was given bail pending trial. But when police arrested a man on February 29 and took him back to his flat, they found Ho, who admitted he had bought drugs found on the premises for $27,000. Ho's counsel, Lambert Lee, said in order to support his family and drug habit, the defendant got involved in the drug trade.