Lionel Messi and his father Jorge have been summoned to court in Spain as part of an investigation into tax fraud allegations.
A court in Gava, near Barcelona - where Messi plays his football - accepted a prosecutor's complaint that Messi and his father defrauded the Spanish tax office of €4m (£3.4m) and the pair are scheduled to appear on September 17th.
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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.