A Hong Kong man who threatened a young woman by holding a key to her neck, then molested her for more than 30 minutes was jailed for 12 years on Friday.Kam Chun-kit, 45, attacked his 20-year-old victim near a public housing estate in Kwun Tong on June 6 last year, sending a chill through her neighbourhood.Sentencing Kam on Friday, High Court judge Mr Justice Poon Siu-tung noted the accused had not raped the woman, referred to as X in court, but his conduct was equally as serious.Kam ran his…