Also on East Asia Tonight: Summer Davos underway in China's Dalian; China's top diplomat Wang Yi stresses that the US-Iran deal must hold; and Seoul says it will accept any North Korean soldiers captured in Ukraine if they want to. 00:00 Headlines 01:34 South Korea's KOSPI tumbles 04:54 Day one of the World Economic Forum's Summer Davos 15:28 South Korea will accept all North Korean prisoners of war if they choose to resettle 19:01 Bookbuilding for China Resources New Energy draws strong demand