On the sidelines of the Summit, President Xi also met South Korean President Park Geun-hye. Xi Jinping called for dialogue to resolve what he called the "predicament" on the Korean Peninsula. He said China stands ready to make efforts in a constructive way to resume dialogue within the framework of the Six-Party Talks. He called on all parties to refrain from any rhetoric and act that could escalate regional tension. The two also exchanged views on closer cooperation on Belt and Road Initiative, financial sectors and cultural exchanges.

WASHINGTON D.C., March 31, 2016 (Xinhua) -- Chinese President Xi Jinping (2nd R) meets with his Republic of Korea (ROK) counterpart Park Geun-hye (3rd L) on the sidelines of the fourth Nuclear Security Summit in Washington D.C., the United States, March 31, 2016. (Xinhua/Zhang Duo)

Xi Jinping also met with Danish Prime Minister Lars Loekke Rasmussen. Xi called for maintaining the momentum of high-level exchanges, and strengthening cooperation on green development, innovation and people-to-people exchange. He also hoped for stronger coordination in international organizations such as the United Nations.

WASHINGTON, March 31, 2016 (Xinhua) -- Chinese President Xi Jinping (R) meets with Danish Prime Minister Lars Loekke Rasmussen in Washington, the United States, March 31, 2016. (Xinhua/Xie Huanchi)