TWO killers involved in the cold-blooded murder of a young businessman whose corpse was found rotting in the sea were yesterday sentenced to a total of 21 years. Wong Hing-shun, 20, was jailed for 14 years, and 22-year-old Ng Chi-kin got seven years for being part of the gang which grabbed 21-year-old Ng Tang-chak outside his North Point office. The pair admitted kidnapping and manslaughter charges. Their three accomplices were given life sentences at the High Court last week. Yesterday, Mr Justice Stuart-Moore said the 'ghastly crime' was one of the worst cases of its kind. Wong admitted helping to plan the kidnap with the businessman's former friend and employee Cheung Man-chi, 23. Ng was snatched on November 15, 1993, by Wong Chi-moon, 25, and 19-year-old Chun Yiu-wah. The gang took him to a villa in Sai Kung where they bound, gagged and dumped him in the toilet. But when Cheung failed to get money out of the victim's account by using his cash card, Ng was strangled and his body stuffed in a bag. Then the killers threw him into the sea. A construction worker fished out the holdall and its rotting contents on November 19. There was a pillowcase over Ng's head and his hands and feet were tied. After his arrest Wong Hing-shun told police he did not have anything to do with the killing. But he admitted renting the bungalow with Cheung and pawning Ng's watches for $5,800 after the murder. He also recruited a friend, Chan Chi-kin, 20, to cash a cheque signed by Ng before his death. After the killing, Wong, who was paid $300 for his role, helped put the body in the black holdall and take it to Wong Shek Pier. Defence counsel Anthony Mitchell-Heggs said although Wong went along with the kidnap plot, it had been Cheung's idea. Ng Chi-kin, who gave evidence against his co-defendants in the murder trial, said he was paid $2,000 to be the driver. He admitted taking the victim to the bungalow and driving the body to the pier. Defence counsel John Mullick said Ng had played a relatively minor role and could be in danger after giving evidence. Mr Justice Stuart-Moore said: 'The sentences must reflect the revulsion the public must feel for crimes of this kind.' He told the pair: 'Neither of you took any physical part in the killing, but each was closely involved in this dreadful crime and each of you bears responsibility. 'This is one of the worst cases of its kind. A completely blameless young man was pulled off the streets of Hong Kong just because it was believed he was well off.' Ng also admitted preventing Ng's burial and Wong pleaded guilty to a separate robbery.