South Korean Defense Minister Jeong Kyeong-doo attends the 18th Shangri-La Dialogue held in Singapore, June 1, 2019. South Korean and Japanese defense ministers and the EU high representative for security expressed optimism about the positive developments on the Korean Peninsula over the past one and a half years here on Saturday at the 18th Shangri-La Dialogue. (Xinhua/Then Chih Wey)