Leaders from China, Japan and Republic of Korea have had their first trilateral summit in Seoul in more than four years. Chinese Premier Li Qiang has called the meeting as "both a restart and a new beginning". What’s behind the resumption of the summit meeting and how significant was it for the three countries and the region? What will a trilateral free trade agreement be like as the three countries resume negotiations? And finally, what are the challenges facing the three neighbors in an increasingly divided and competitive world?

Guests in this edition of Dialogue are Professor Zha Daojiong from Peking University, Professor Robert Kelly from Pusan National University and our correspondents Terrance Terashima in Tokyo and Sumin Yoo in Seoul.