Dannen Chan Kim-wai vividly recalls the joy he felt when his son - 'a lovely and healthy child' - was born in 2005. But there was a problem. As he grew, Rex didn't speak a word, he says.
'Friends comforted us with the usual words, saying that boys typically start talking later than girls. But when all my boy uttered was a single syllable 'da' at age two, we decided not to wait. We took him to the Child Assessment Centre. There he was diagnosed as having symptoms of autism.'
Hong Kong is seeing a big leap in autism cases. Last year, the Health Department diagnosed about 1,500 children under the age of 12 with autism spectrum disorders (ASD) compared with 218 children in 2000. That is a five-fold increase over the past 10 years.
Heep Hong Society, which provides education for special needs children from two to six years old, notes that half of the 824 preschool children under its care last year had ASD. If this number is combined with children with developmental delays, which includes potential ASD youngsters, the proportion would exceed 80 per cent.
Experts such as Dr Karen Sze Man-san of SAHK (formerly known as the Spastics Association of Hong Kong) attribute the rising number to greater public awareness and improved diagnostic techniques, rather than a growing incidence of the disorder. But that has also meant that public services to help families with autistic children fall far short of their needs.
'In the past, people associated autism with the mentally handicapped, and this stereotype was reinforced by the movie Rain Man,' Sze says. 'But thanks to increasing reporting in the media, more and more people have come to know about autism and its symptoms. They understand that a person with ASD may have a normal IQ but poor communication skills or language ability.'
The developmental disorder has often been under-diagnosed in Asia. But it was over-diagnosed in the West, says remedial education specialist Michael Maloney. Also a consultant at Hong Kong Junior, a school for autistic children, he compares the rise of autism cases to the idea that 'if you put more cops on the street, you find more crime'.