'That kid over there didn't get along with anyone on the team,' said Tank Lam Hip-hau.
The part-time coach for the Breakthrough rugby team nods towards a wiry boy who moments earlier was swearing he was the model of good behaviour.
'He had aggression issues, got into a lot of fights at school. Now he plays for Hong Kong on the under-19s team.'
Breakthrough is a sports programme for troubled youngsters that has been run by former and current members of the Hong Kong police since 1966.
In February it got a HK$600,000 grant from the Partnership Fund for the Disadvantaged to increase its rugby training programme to 100 students for the year, expanding to include schools with a higher percentage of minority children.
Now the fund is looking for more programmes to fund next year.