Around one in four parents knows of a child in their area who may be going hungry, a survey has found.
The poll suggests that the problem may be getting worse, with many parents saying they have seen an increase in the numbers of youngsters they are worried about.
But it also reveals that many are reluctant to get involved, with more than half failing to report their concerns to the authorities.
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.