There have been dramatic developments over some of the long-lasting issues in the Asian-Pacific region that seem to shape the way we organize ourselves for security and development in the region. I take this opportunity to discuss four developments and what they mean for Asia-Pacific development.The latest developments on the Korean Peninsula have seen highest-level policy makers directly engage with each other over conflict on the Korean Peninsula and this has created a new set of dynamics that are driving the Korean issue to develop in a way we have never seen before. The latest inter-Korean summit suggests we are one step closer to resolving the problem of denuclearization and meeting the challenge of making peace，security and development possible on the Korean Peninsula. The Korea developments，while still unfolding，will have great implications for the region’s international order.Trade tensions between the United States and China have brought the world’s two largest economies in direct engagement on economic and industrial competition. This competition is pitched in a way that shows how they would like to organize global industrial development in the years to come. The outcome of the competition will have great implications for the structure of global production，services and resources provision. This development will complicate international political economy in the Asia-Pacific where multilateral institutions have been the primary platforms and enabling mechanisms in organizing the region’s economic cooperation and integration.US withdraw from the TPP and the fading away of US Pivot to Asia opened quite a bit of space where “middle powers” are actively asserting themselves and seek their role in the new environment. Indeed，middle powers in the region are more active and want to play a greater role in their own right. This has been a notable trend where great power politics，much dominated by US-China strategic interaction，has left many to look after their own interests and for new ways，new partnerships，and new platforms to engage for their own interests.Finally，one can’t avoid mention China’s BRI in discussing major developments in the Asia-Pacific. There is much debate on the scope and purposes of the BRI，what drives it and what it is to achieve. This is a significant development in the world economic system because of the scale of the programme and activities，the particular way it is organized and how it relates to the structural dynamics of China’s industrial development，and the opportunities and challenges it brings to the Asia-Pacific region in development organization and cooperation.In the following sections，I’ll look at each of these developments in more detail and summarise their implications for Asia-Pacific development.