A leading member of the April 5th Action Group punched an unemployed man who told two youths not to support the group because it was bad for Hong Kong, a court heard yesterday. Wong Keen-wah, 54, accused political activist Leung Kwok-hung, 43, of hitting him on May 22 as the group conducted a signature campaign near Kwun Tong MTR station. When Mr Wong came out of the station at about 5pm, he heard the group calling on people to commemorate the June 4, 1989, pro-democracy crackdown in Tiananmen Square, Kwun Tong Court heard. 'I saw two pupils aged about 12 signing. I went up and asked if they knew what the group was doing. They said they didn't. I then said: 'Your parents would go jobless if you went on to support the group'. 'I wanted to teach them to distinguish between right and wrong . . . The group hasn't done anything good for Hong Kong people. It disrupts Hong Kong,' the former aircraft engineer said. Leung and Mr Wong then exchanged words. Leung told the court: 'I didn't swear at him, but he used swear words in every sentence. I told him we could have different political views but he could not humiliate my mother and those sacrificed in the June 4 massacre.' He pleaded not guilty to a charge of common assault. The case continues today before Magistrate Julia Livesey.