A convicted paedophile has been jailed for 4½ years for committing obscene acts against a seven-year-old boy while working as a private tutor in Hong Kong more than two years ago.Ng Tin-yu, 24, was sentenced on Wednesday for repeatedly molesting the boy at the latter’s home in Kowloon City until a camera in the child’s bedroom captured one of the incidents, leading to the defendant’s arrest.He pleaded guilty earlier this month to nine counts of committing an act of gross indecency towards a...