A youth found wandering in Guangzhou is not the missing autistic teenager The mother of missing autistic teenager Yu Man-hon was devastated last night when told a youngster found wandering in Guangzhou was not her son. Man-hon disappeared on the mainland nearly four years ago, but Yu Lai Wai-ling drew fresh hope after being told on Tuesday he might have been located. She broke down last night after officials confirmed their fingerprints did not match. 'It's just unbearable. When can I find him?' Mrs Yu said, fighting back tears. Man-hon, who has a mental age of two, ran away from his mother at Yau Ma Tei MTR station and later slipped across the Lowu border on August 24, 2000. Mainland officers asked their Hong Kong counterparts to check but they sent him back after failing to verify his identity. The boy, now 19, has not been seen since. Mrs Yu, who has been running appeal notices in Guangdong newspapers over the years, regularly receives calls about sightings of boys who look like her son. She was given fresh hope when a man called her from Guangzhou at 5pm on Tuesday saying he had spotted a boy who looked like Man-hon outside Baiyun district court in the city. The man, Peng Lijun , a computer salesman, said he found the boy sitting outside the court. He thought he resembled Man-hon, whose picture he had seen in a missing person advertisement in a local newspaper the previous day. Mrs Yu then alerted Baiyun public security officers, who later located the boy. She also faxed the fingerprint records of Man-hon to the officers for verification. But last night the Hong Kong Security Bureau told Mrs Yu it had learned from Guangzhou authorities that the fingerprint records of the two youths did not match. Huang Zhiquan , a superintendent of the Xinshi Street Public Security Bureau, where the youth is being held, said the boy was 1.76 metres tall. Man-hon was 1.68 metres when he disappeared. 'He doesn't understand Cantonese at all but he understands Putonghua,' Mr Huang said. Some reporters who flocked to the Public Security Bureau yesterday were allowed to see the boy. 'He has no gap between his front teeth, the ears look different and he has a slighter built than Man-hon, who is broad,' one reporter said. 'The superintendent said the boy was 100 per cent not Yu Man-hon. He said the fingerprints did not match.' Mrs Yu said that whenever she received such a report about her son she had to tell herself not to be too hopeful. 'It's very painful to go through the ups and downs. If I feel very hopeful, I'll be at a loss when it turns out not to be my son,' she said And last night she insisted she would not give up her search. 'He's my son, I'll continue to look for him.'