AN illegal immigrant who kidnapped a 28-year-old woman and demanded a $500,000 ransom was yesterday sentenced to 15 years' jail. Tsang Kam-cheong, 32, admitted one count each of kidnapping, robbery and possessing an imitation firearm during a robbery, and two counts of theft. The High Court was told that Suen So-yin was held for two days in the New Territories after leaving the Chinese University. Senior Assistant Crown Prosecutor Samuel Leung said Ms Suen, a teacher studying at the university, left the campus and caught a bus to her Sha Tin home at about 8 pm on November 12 last year. Tsang pushed her into a ditch as she walked along Kau To Shan Road, and threatened her with what looked like a pistol. He grabbed Ms Suen's handbag and demanded the code number of her ETC card. He then tied the victim's hands behind her back, bound her feet and carried her down the hillside. He gagged her, covered her body with a cloth bag and warned her not to make any noise while he went to withdraw money from her account. Tsang returned after about an hour and said he would withdraw another $6,000 after midnight, when he again left her, returning later with the cash. Mr Leung said Tsang then untied the victim and said he would demand $500,000 ransom from her family. Using a torch, Tsang led her up the hillside, where he again bound her hands and feet, gagged her and covered her body with the cloth bag. He then went to buy a portable phone and food, and returned about 5 pm. He phoned her family and demanded $500,000 for her release. They stayed on the hillside for the night and the following day there were negotiations over the ransom, which was reduced to $200,000. He tied the victim to a tree and went to pick up the ransom. He returned at midnight, untied the victim and took her to Tai Po Road. He returned her handbag and some money, and walked with her to a bus stop, where he was arrested. Passing sentence, Mr Justice Ryan took a starting point of 20 years and reduced it to 15 because of Tsang's plea. In mitigation, Paul Dinan said the offences had not been planned. He said Tsang had been frank with police and pleaded guilty at an early stage.