Mobile phone signal helps narrow search for man missing for a week The body of a hiker missing for a week was found at the bottom of a cliff on Lantau yesterday. Lo Si-fai was found as police, fire and civil aid officers were joined by about 100 hikers who volunteered to look for the 42-year-old hiker. Their efforts to find Lo, who had been missing since leaving his Hung Hom home at 7am last Sunday, finally paid off about 11.40am. 'We saw something at the bottom of Dou Ron Rock. At first, I thought it was just a big bag and I asked my friends to take a look. My friend said it could be a body,' one of the volunteers said. 'His head was facing down, and one of his legs was twisted and his shoes were scattered. His backpack was hanging on a tree.' Shortly before 1pm, a Government Flying Service helicopter flew the body to an open area near Lo Hong Monastery on Shek Mun Kap Road, where it was loaded into an ambulance. Lo's brother, who reported him missing last Monday, told authorities he had taken up hiking about a year ago. He said Lo, who worked for a books wholesaler, sometimes went on group hikes, but more often went alone. After yesterday's discovery, police contacted Lo's family and his brother went to the scene to confirm the identity of the body. Civil aid service officers said they believed Lo fell from a height. 'His shoes were found somewhere around the location of his body. It was very dangerous to hike there, as there are too many broken stones and boulders. Hikers can easily trip and fall,' one of the officers said. Police said the search was narrowed to Ngong Ping on the second day after officers approached a phone operator to detect his mobile signal. 'But even though we made the search area much smaller, it still took some time to look for him in Ngong Ping.' Liu Ka-wah, a hiking coach at the Hong Kong Mountaineering Training Centre, warned that even though telecommunications networks covered remote areas, hikers should not rely on their phones to get help. 'Police can trace the whereabouts by detecting the mobile signal, but it is difficult to locate a person in such a big area. Hikers in danger still cannot receive immediate help, which is vital for their chances of survival,' he said. Mr Liu said it was generally quite dangerous to hike at Lantau Peak if hikers did not follow the Lantau Peak Trail. 'The landscape there is not easy to conquer. And one simple lesson for all hikers - never hike alone. You should be with at least four people,' he said.