SEOUL, May 22 (Xinhua) -- South Korea's presidential Blue House said Tuesday that it saw 99.9 percent of possibility for the agreed summit between the Democratic People's Republic of Korea (DPRK) and the United States to be held as scheduled.

Chung Eui-yong, top security advisor for President Moon Jae-in, told reporters on a flight to Washington that South Korea currently had 99.9 percent of expectations for the DPRK-U.S. summit to be held as agreed upon though the country was preparing for several possibilities, according to the Blue House.

Moon, accompanied by Chung, arrived in Washington Monday night (Washington time) to hold a summit meeting with U.S. President Donald Trump on Tuesday.

Chung told reporters that the South Korea-U.S. summit was aimed at frankly exchanging opinions between leaders of the two countries about how to manage situations, saying the summit would be focused on talks between Moon and Trump.

Though the luncheon meeting was scheduled with secretaries of the two leaders in attendance, Moon and Trump will focus on their one-on-one meeting, which is the strongest point of this summit, Chung noted.

He said Moon and Trump will frankly talk about ways to make the DPRK-U.S. summit successful, to reach a significant agreement at the summit and to implement the agreement.

Trump and top DPRK leader Kim Jong Un has agreed to meet on June 12 in Singapore for the first-ever DPRK-U.S. summit.