For nearly 22 years, it has been my pleasure to have Tom Mockridge as a colleague.
Whether it was his early days with our newspaper group in Australia, his incredible work building Sky Italia, or his steadfast leadership of News
International, Tom has always been a skilled executive and a trusted friend.
His decision to step down is absolutely and entirely his own. I am sorry to see him leave us but I know he will be a great success wherever he goes."
More top news
Mr Kim has made two recent visits to China.
The study looked at the development of 422 children over the course of eight years.
The president said they will come into force if China refuses to change its practices.