THE Court of Appeal doubled the sentence of a cannabis trafficker yesterday after agreeing with the Attorney-General that a three-year sentence was inadequate because of the quantity of drugs involved. So Chin-chiu, 30, had admitted trafficking in herbal cannabis before Deputy Judge Wong on September 1 and the judge took a starting point of four years, which he reduced for the plea of guilty. Senior Crown Counsel Darryl Saw said the sentence was inadequate and completely out of line with Court of Appeal guidelines. The court heard that the quantity involved was 93 kilograms of cannabis. The drugs were found in So's Mongkok flat on October 31, 1992, after he knocked on the door of a hotel room in Wan Chai that police were raiding. He said he was being paid to store the drugs for a friend. Mr Saw said an appropriate starting point would be 12 years because the amount of drugs meant major trafficking and huge profit margins. The wholesale value of the drugs was $1 million. Wong Po-wing, for So, said the four-year starting point was on the low side, but was not wrong. Giving the court's judgment, Vice-President Mr Justice Macdougall said the tariff for possession of 9 kg of cannabis resin was four years' jail. In this case the higher quantity meant the proper starting point should have been eight years. The court substituted a sentence of six years for the original three-year term. During the hearing, it was disclosed that 11 months ago the Court of Appeal had asked the Legal Department to compile information on the use of cannabis to enable the court to determine appropriate sentencing guidelines. The Court of Appeal refused to let the Crown use this information in a review of sentence in November and said a reason would be given later. So far, no reason has been given by the court which comprised Mr Justice Silke, Mr Justice Bokhary and Mr Justice Mortimer. Yesterday, Mr Justice Macdougall expressed surprise that the evidence had not been allowed.