A fat man failed to lose enough weight to avoid jail yesterday - even though he shed two kilograms in a fortnight. Cheung Chun-fai, 24, went on a crash diet after Judge Chua Fi-lan said he must fight the flab or face prison following his conviction in the District Court for wounding with intent. In the two weeks since the judge's warning, the rotund road worker lost the amount of weight experts recommend as being sensible in that time. But Judge Chua said Cheung was still not slim enough to qualify for a detention centre, even though she said it would be suitable for his rehabilitation. She jailed him for 10 months instead. 'We are in the middle of hot whether; it would be dangerous for you,' she said, adding that a detention centre sentence 'is short but very tough'. The judge also rejected the option of sending Cheung to a training centre because he is 'too old'. Cheung is 1.69 metres tall and now weighs 93 kilograms, about 31 kg more than an average Chinese man of similar height and age. Cheung was found guilty of hitting his ex-lover's new boyfriend on the head with a crowbar. He followed So Wing-yin to Cheung Chau on October 18 last year, hoping to persuade her to return to him. Cheung climbed into a flat where Ms So, 20, and her new boyfriend were sleeping. In a jealous rage, Cheung attacked Cheung Wai-tong, 19.