A lawmaker's assistant was found guilty of obstructing traffic by standing near the edge of a footbridge connecting the Admiralty Centre and the government headquarters on the first day of last year's Occupy protests. Magistrate Lee Siu-ho said he did not accept Au Yeung Tung's argument that his acts on September 28 were performance art and that he could manage the risk involved. Au Yeung, assistant to Frederick Fung Kin-kee, was convicted of one count of obstructing a public place. The 36-year-old had earlier denied the charge. During the trial, Au Yeung argued that the obstruction to traffic along parts of Harcourt Road underneath the footbridge was caused by the authorities sending firemen, ambulancemen and a police negotiator to the scene. He complained that the government was oversensitive to his acts. But Lee said: "It is reasonable and definitely not oversensitive for the relevant authorities to send firemen and negotiation experts to the scene, and to set up a rescue air cushion." Eastern Court heard that Au Yeung's acts had caused serious traffic congestion and many drivers and passengers had to get out of their cars. A policeman earlier told the court that he spotted Au Yeung climbing over protective barriers on the bridge linking the Admiralty Centre and government offices in Tamar. "He said he was Ah Tung. He was expressing his demand for universal suffrage. I then heard him count loudly: one, two, three ... " The officer later learned that Au Yeung wanted to count to 2047 - the expiry date of the "one country, two systems" policy. The magistrate said yesterday: "Common sense tells us that based on the defendant's actions, location of the event, and the necessary reaction of the authorities, the defendant must have known that his actions would cause obstruction to traffic." Lee adjourned sentencing to July 14, pending background and community services reports. Barrister Richard Yip reserved his mitigation submissions for Au Yeung, who was supported by a group of people sitting in the public gallery of the court.