A 16-YEAR-OLD girl was forced into prostitution by two ''friends'' who told her they needed the money to pay off a loanshark, the District Court heard yesterday. The girl testified that one of the men had threatened to chop her family when she refused to see any more ''customers''. Lai Siu-hoi, 18, and Yeung Wing-chi, 22, went on trial charged with procurement of a woman under 21. Yeung faces additional charges of living on the earnings of prostitution and criminal intimidation. They have denied all charges. Prosecuting counsel John Dunn told the court the girl had regarded Lai as an adopted elder brother. The prosecutor said the girl was out with friends on January 1 last year when Yeung took her aside and told her that Lai was in great danger - he owed $200,000 to a loanshark. Yeung asked her to become a prostitute to help pay the debt. Lai later asked her if she was willing to help, Mr Dunn said. The girl testified that Yeung met up with her five days later for a ''joy ride'' and took her to a building in Lai Chi Kok Road. She said he led her to a room and left her with a man she had never met before. In his opening address, Mr Dunn said the man was Leung Wan-keung, and that Yeung had told him that the price for the girl was $220. Yeung also said that he was ''the one responsible for taking the money after the transaction'', the prosecutor said. The girl, when asked what happened next, blushed and bowed her head. When the judge insisted that she answer, she murmured: ''Sexual intercourse.'' She said she had done it ''to help Lai'', but when asked how this would help him, she answered that she did not know. The next night, Yeung told the girl he had accepted orders for her from seven customers. The girl said Yeung threatened to ''get somebody to chop her whole family'', when she told him she would not do it any more. The trial continues.