Fire officials have said they are gaining ground against a deadly wildfire in the US state of Arizona after it claimed the lives of 19 firefighters at the weekend.
While the fire remained dangerous and unpredictable, it is no longer burning out of control and fire managers expect to report some measure of containment by day's end.
"We gained some ground ... it's been a pretty good day, and the fire has stayed mostly parked where it was 24 hours ago," said Jim Whittington, a spokesman for the incident commander.
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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.