China's reopening sparks concern abroad

A number of countries mull bringing back mandatory Covid testing for visitors coming from China as a wave of coronavirus infections spreads across the world's second economy. We hear the latest from our correspondent in Hong Kong. Also in the programme, we go back to one of the big stories of 2022: the impact of the war in Ukraine on the global supply of grain. We explore what has changed for the industry as well as the expectations for 2023. And we also look at Japan's latest attempt to persuade more young people to move out of the city and into the countryside.