A martial arts practitioner who surprised three burglars in his house fought them with his hands and brain, a court heard yesterday. Renovation contractor Yu Chung-khiong, 32, pretended to treat the strangers to dinner but secretly phoned for help, the District Court was told. When Mr Yu returned home to Heung Fan Liu village, Sha Tin, on the night of April 2, he was attacked by three illegal immigrants, Ngai Nang-sam, 23, Chiu Fei, 21, and Ng Chi-kong, 21 who had broken into his house. Mr Yu, who has practised martial arts for 20 years, tackled the armed burglars but was injured. He then suggested that instead of fighting they should talk, Judge Bernard Whaley heard. Ngai, Chiu, and Ng agreed to drop their knives and told Mr Yu they had sneaked into Hong Kong. He told them there were no valuables in the house but promised to help them find jobs at a construction site. He then offered to take them out to dinner and gave Ng $600 to show his 'goodwill'. While the four sat talking, Mr Yu secretly dialled his friend Siu Cheuk-tong on his mobile phone. He raised his voice so that Mr Siu could hear the conversation. Mr Siu called the police. Mr Siu heard Mr Yu suggest a restaurant in Mei Lam Estate, Sha Tin, where police later arrested the trio. Ngai, Chiu and Ng pleaded guilty to a joint charge of aggravated burglary and to separate charges of illegally entering Hong Kong, but pleaded not guilty to a joint charge of assault occasioning actual bodily harm, which was left on file. Judge Whaley will sentence the three today. Outside court, Mr Yu said he acted calmly even though he was frightened. 'If my girlfriend had been there, I would have begged for my life,' he said. 'I decided to take them out for dinner because it was safest for me to get out of the house.'