A TAXI driver who robbed a female passenger and then tied her up and put her in the boot of the car was jailed for seven years at the District Court yesterday. Li Sum-leung, 41, was found guilty after trial of robbing Ms Cheng Siu-kuen of $250 in cash, valuables and credit cards on April 12 last year at Sun Lei Yuen, Tsuen Wan. Prosecuting counsel Mr Newman Wong told the court that Ms Cheng boarded the taxi at Yuen Tun Circuit near Tsuen Wan Plaza. She told Li to go to Shek Lei Estate, Tsuen Wan. During the journey, Li produced a knife. He also took out a bottle, which he claimed contained sulphuric acid. Li stopped on a road leading to Sun Lei Yuen and used wire to tie Ms Cheng's hands. He searched her handbag and stole her purse, a gold bracelet and necklace, and credit and bank cards. He also asked her to give him the pin numbers of the cards. He then tied her legs, put some adhesive tape around her mouth and put her into the boot of the taxi before driving off. After a while, Ms Cheng managed to release her hands and legs. When the taxi stopped, she opened the boot and jumped out. She went to a 7-Eleven shop and rang for help. Li fled the scene before the police arrived. He admitted the offence about a week later when he was arrested for trying to rob a taxi driver. The court heard that on April 17, taxi driver Mr So Ying-lun picked up the defendant at the taxi stand at the Tai Wai KCR station at Sha Tin. Li told him to drive to the circuit in Mai Po Nature Reserve. As they arrived at the International Kart Club, he told Mr So to go into the club. Inside, the defendant took out a knife and grabbed the victim's neck from behind. Li told Mr So not to move or he would die. The victim struggled with him, sustaining a cut to his left palm. Mr So managed to escape shortly after and sought help from a woman in a house nearby. The police found the defendant in some bushes at Mai Po Sun Tsuen and arrested him. Li pleaded guilty to assault with intent to rob Mr So and possessing a knife without authority. Defence counsel Ms Penelope Wacks told Deputy Judge To the defendant had committed the offences because of financial difficulties. Both he and his wife suffered from ill health and spent a lot of money on medical bills. She said the defendant earned $6,000 a month.