A nine-year-old girl who hanged herself at home did so because she was disappointed with her test results, a classmate said yesterday. Ada Wong Tsz-ling, who had been top of the class at Buddhist Lam Bing Yim Memorial School when she was in Primary One and Two, received her results on Wednesday. A boy in her class, surnamed Pong, said he overheard her tell other children that she was unhappy with the results and wanted to end her life. Hours later the girl's mother found her hanging by a rope from a window in her bedroom in their Kwai Chung home. Pong claimed she scored less than 90 per cent in the Chinese language, maths and general studies tests, and 90 per cent in the English language test. The tests ended on Tuesday. The school's principal, Lee Suk-yee, said Ada had done well, although it was unclear whether the Primary Three pupil would still have been top of her class. 'There was no indication she was under pressure,' the principal said. Ms Lee said the girl had not acted unusually before she killed herself. She added the school was deeply saddened by what had happened. 'The girl did well academically and was well behaved. She was an open and vivid student, and a helpful person.' Educational psychologists and social workers were at the school yesterday to counsel pupils. The tragedy has prompted the government to consider giving more support to parents and improving parental education. Stephen Fisher, director of the Social Welfare Department, said: 'I feel so sorry about the incident. It's a reflection of the problem that children are rather weak when facing adversity. They do not ... know how to deal with it. That [might] lead them to commit suicide.' He said the best way to prevent this happening again was to make sure children felt cared for. 'Children at high risk are those who feel totally neglected,' Mr Fisher said. 'Usually, there are signs [of suicidal thoughts]. Parents can notice that their kids are facing problems if they pay more attention to them.' A department spokeswoman said its social workers had not dealt with the family before.