A lawyer representing a man convicted of wounding tried in vain yesterday to compare his client's actions with the US strikes on Afghanistan, in an attempt to secure a lighter sentence. Security guard Li Ching-chuan, 54, was jailed for 20 months by the District Court after being found guilty of wounding with intent. His son, Li Shing-cheung, 30, was acquitted of the same charge. On December 31, Li Ching-chuan chased three teenagers and attacked one with a chopper because he thought he was part of a gang that had earlier threatened the family's two younger sons and their mother, the court had heard. Barrister Gibson Shaw, for Li, said his client committed the offence 'on the spur of the moment' as he was desperate to protect his wife and young sons. 'I would say, daringly, the law is not fair. My client has been law-abiding all his life but was put into such a predicament because he wanted to protect his family. But the gang members who harassed him are not in trouble. It is strange that there are different results for different people who do the same thing. 'The whole world agrees with the United States when it strikes back at terrorists after the September 11 attack. But my client's acts were considered unacceptable.' Mr Shaw said Li and his family had often been harassed by gangs near their former home in Tsuen Wan, but had now moved away. The court heard Li believed the teenager he chopped was among the gang that bullied his family members earlier in the day. Deputy Judge Anthony Kwok Kai-on said while he understood Li might have felt aggrieved that the people who allegedly harassed his family were not charged, that did not justify his actions. 'Everyone should respect the rule of law and should not try to take the law into their own hands. The court cannot be lenient to someone who commits violent and irrational revenge,' he said. Victim Tam Kwok-hung, 15, suffered chop wounds to his back and right hand. He denied being part of the gang that harassed the Li family.