A mainlander who threatened to chop his daughter unless the girl's mother, his ex-girlfriend, gave him $200,000 was jailed for 3.5 years yesterday. Cheung King-shun, 38, was convicted of three counts of blackmail, one of criminal intimidation and one of possession of a corrosive substance by District Court Deputy Judge John Saunders. The judge said he understood Cheung may have been deeply upset but this could not justify threats made towards the victim. Tseung Fung-ping testified that she had met Cheung in 1986 and they had started living together in 1988 on the mainland. She gave birth to their daughter in September 1989 and left Cheung four months later as she could no longer tolerate his abuse, she said. Ms Tseung told the court that in 1990 she married a Mr Tam, who sponsored her and her daughter to come to Hong Kong, but they divorced in 1995. In May this year, she told Cheung that she would be remarrying and Cheung told her to give him $200,000 or he would harm her and kidnap their daughter, the court had been told. 'He said he would throw corrosive acid into my face and would chop my daughter's arms and legs,' Ms Tseung said. After repeated threatening calls by Cheung, Ms Tseung reported the matter to the police on July 29 and Cheung was arrested that night, carrying a bottle of nitric acid, at the staircase just outside Ms Tseung's home. Cheung, who represented himself, denied all charges and said Ms Tseung had framed him.