A taxi driver hacked his girlfriend to death with a 30cm chopper after a voice told him to kill a "big grizzly bear", a court heard. Prosecutor Diane Crebbin told the High Court that the chopper was resting on the back of Vu Po-cheng's neck when police officers found her body. Fung Sum-wong, 64, pleaded guilty yesterday to one count of manslaughter. The court heard that on November 28, 2013, a neighbour heard a loud noise coming from the couple's Sham Shui Po home, with a woman shouting: "We have been together for so many years. Why do you have to kill me?" The woman also yelled: "We adults don't act on impulse. Sit down and talk then everything can be dealt with." Police were called and Fung, his face and body covered with blood, answered the door. Crebbin said: "He looked dull with glassy eyes. He was not armed and he did not say a word and was unresponsive to all questions." Moving inside the flat, officers found Vu, 53, on the living room floor, her skull cracked open. Seventy-one cuts were found on her body. Fung told police later that day that he had suddenly lost his mind and saw a big grey bear. He then chopped it to death. The court heard that Fung was involved in two traffic accidents in 2013, the second one resulting in headaches, insomnia and blurred vision. Deputy High Court judge Mr Justice Michael Stuart-Moore adjourned the case to June 9, pending psychiatric reports. Outside court, the victim's sister said her family was "shocked and angry" at Vu's death. They were also unhappy that the original murder charge was dropped to manslaughter by reason of diminished responsibility.