A lift repairman who robbed three lone women by threatening to throw corrosive liquid on them from his perch on top of elevators was yesterday jailed for six years. Lo Wing-fai, 29, splashed liquid in the direction of two of his three victims as he threatened them in lifts of Wan Chai buildings in March and April this year. His threats were terrifying but baseless, Mr Justice Colin Jackson said, as the liquid was water. But they had the desired effect since Lo's victims, aged from 28 to 34, surrendered either cash or a mobile phone plus cash. In all, Lo escaped with $1,520 and two phones. 'These are grave offences - lift robberies committed against lone women in circumstances aggravated by terrifying, albeit baseless, threats - committed by a man with specialist knowledge of lifts,' Mr Justice Jackson said. Lo pleaded guilty in Eastern Court on September 21 to committing three robberies, on March 8, March 22, and April 30, in lifts in buildings in Jaffe Road, Hennessy Road and Johnston Road. He was sent to the Court of First Instance for sentencing. The court heard that on each occasion, Lo opened the lift doors with a maintenance key or strong piece of wire. He would then climb on top of the lift through the escape hatch and wait for lone women passengers to enter, prosecutor Paul Ho said. Lo would threaten to pour corrosive liquid on the victim unless she handed over money and valuables, and would lower a plastic bag for her to put the valuables in, Mr Ho said. The victims were then trapped inside the lifts until maintenance staff arrived. Police eventually arrested Lo at Happy Valley racecourse on May 6 in circumstances not revealed in court. Defence barrister Peter Duncan said Lo was genuinely remorseful, adding that he had worked as a lift repairman for 11 years but had turned to crime after his employer went out of business and he failed to find a new job. Mr Duncan said his client was of previous good character and a good husband and father whose wife and son lived on the mainland. In sentencing Lo, Mr Justice Jackson adopted a starting point of 10 years' imprisonment, but reduced it to six years on account of Lo's early guilty plea and personal circumstances.