AN inmate of the Tai Lam Correctional Institute who claimed he had been bullied by a fellow prisoner admitted hitting the man in the face with a piece of rattan pierced by a 10-centimetre nail. Yip Kau, 37, pleaded guilty in the District Court to maliciously wounding Tse Ping-chai at the correctional institute in Castle Peak on September 7. Yip was sentenced to 21 months' jail. He struck Tse three times in the face with the rattan stick before he was restrained by guards. Tse received minor injuries including two puncture wounds over the right cheek. The court heard that Yip and Tse, who were both serving terms for drug offences, had a row over seats while they were watching television at the institute's assembly hall two days earlier. Deputy Judge Davies said it was more by luck than judgment that the victim was not seriously hurt. ''[The incident] took place between inmates in a correctional institute where discipline is of the highest priority and where rehabilitation is one of the major objectives,'' he said. Jackson Poon, counsel for Yip, said the victim was part of gang who behaved oppressively inside the prison. He said Yip, who had suffered constant bullying by Tse, acted out of anger and provocation.