A PATHOLOGIST from the Public Security Bureau in Yunnan jumped from a bridge over Princess Margaret Road, Ho Man Tin, yesterday, clutching her mainland passport. Chu Xiaoping, 38, who came to Hong Kong on a one-month United Nations exchange programme last Friday, was taken to Queen Elizabeth Hospital where she was in poor condition. Ms Chu, who worked at the Government Laboratory, had intended to return to China before the end of the exchange. Assistant government chemist Dr Ned Dailly, who heads the Government Laboratory's forensic science division, said last night that Ms Chu was on an exchange visit sponsored by the United Nations Drug Control Programme. He said: 'She arrived last Friday and started her course of training with us yesterday. 'She seemed quite happy when she arrived. But another Chinese girl we have with us said she was feeling depressed. She may well have been depressed before she came here. 'She was from Yunnan and I think she found Hong Kong a bit too much for her. It was not the pressure of the work - she only started yesterday. 'During yesterday she said she wanted to go back. 'Some staff tried to persuade her otherwise, but she insisted, so we booked a flight for her. The girl she was sharing a hotel room with said she would look after her overnight. 'They came into the office together this morning, and while we were sorting out her expenses, she said she wanted to go to the toilet and disappeared. 'We sent some staff to look for her, but by that time it was too late.' Ms Chu was found lying under the Princess Margaret Road flyover near Pui Ching Road shortly after 10 am. A passer-by said he had seen the woman jump from the flyover.