Choe Kang II took a flight from Helsinki, Finland and arrived in Beijing early morning before heading back to DPRK.
In the Finnish capital, Choe led a DPRK delegation and held informal talks with formal US diplomats and South Korean security experts.
Choe Kang II declined to reveal details about the meeting in Finland.
South Korean media reported the talks were positive.
And the Finnish Foreign Ministry said that the participants had a constructive exchange of views in a positive atmosphere.