BEIJING should not intervene in conflicts involving security authorities across the border after 1997, the PWC said yesterday. Local co-convenor of the Preliminary Working Committee (PWC) social and security sub-group, Rita Fan Hsu Lai-tai, said the resolution of the abduction of two Hong Kong fishermen in the territory's waters last month showed that Hong Kong and Zhuhai were working on a co-operative basis. That basis could go on under the principle of 'one country, two systems' and the Basic Law after 1997. Beijing's intervention would not be needed in the future, she said. The incursion by Zhuhai's security officers sparked local concern over the autonomy of Hong Kong's security forces. Beijing was urged to mediate. Meanwhile, the sub-group has invited the Vice-Minister for Public Security, Tian Qiyu, to a seminar on crime-fighting to be held in Hong Kong on May 12. Territory officials may be invited to attend once a way around the Government's ban on official contact with the PWC had been found.