A mentally disabled boy who disappeared at North Point MTR station while on his way home with his mother was found by police in Kwun Tong yesterday after a 16-hour search. The mother of Ching Chi-sing, 14, said he walked away alone after passing through the station gate at about 7pm on Tuesday. Police had issued an immediate public appeal for clues on his whereabouts. He was found unharmed by patrolling officers at 11.30am yesterday in a supermarket in the Lei Yue Mun Plaza. A police spokesman said the case was not suspicious. While Chi-sing's family was relieved that he had been found, a family whose autistic son disappeared nine years ago is still praying for a miracle. Yu Lai Wai-ling said she was still searching for her son, Yu Man-hon, who ran away from her at Yau Ma Tei MTR station and slipped across the Lo Wu border on August 24, 2000. The boy, who was 15 but had a mental age of two, was turned away by Hong Kong immigration officials at Lo Wu when Shenzhen officials tried to return him. After years of searching, Ms Yu said there were fewer and fewer clues coming in. 'We will never give up, as we are his parents. We can never feel peace of mind until we know if he is still alive.' Gillian Lo Cheng Yuk-chun, chairwoman of the Hong Kong Joint Council of Parents of the Mentally Handicapped, said the parents of mentally disabled children should teach them to be able to tell people their name and address. For those who cannot speak, she said parents should ensure they always carry a notice containing basic personal information.