The North rejected earlier comments by South Korean President Moon Jae-in that outlined his desire for unification, saying it has nothing else to discuss with South Korean authorities.
Kim Yeon-chul said he would come up with a creative solution to help North Korea and the US find common ground.
Experts say that the summit was supposed to be Moon's way of distracting South Koreans from economic and employment problems.
Beijing regards Taiwan as its own and has vowed to bring the island under Chinese control by force if necessary.
About 1,400 children of some 2,500 separated from their parents at the US-Mexican border have been reunited with their families.
Lawyers for US Immigration and Customs Enforcement reported in a court filing late Thursday that 364 children aged 5 and older had been reunited since Sabraw's order was issued more than three weeks ago.
The other 46 children were ineligible for reunification for various reasons, including that their parents had criminal histories, were in custody or had been deported, as well as for health reasons.
The Warisan deputy president tells the Kadazandusun Murut people that politicians are happy exploiting their 'imaginary disunity'.
The talks between Nicos Anastasiades and Mustafa Akıncı ultimately proved to be fruitless.
Former Romanian president Traian Băsescu called upon the Moldovan and Romanian parliaments to allow Moldova to relinquish its independence and become part of Romania.