The son of Jimmy Lai, a media tycoon jailed in Hong Kong, said on Wednesday it was in the interest of the former British colony to release his father and not let him die in jail.

Sebastien Lai, who was in Geneva to take part in a British-organized event on media freedom in Hong Kong, has not seen his 75-year-old father in three years.

"I am optimistic because I believe that there's no benefit in the Hong Kong government having my father die in jail," Sebastien Lai said on the prospect of his father's release.