How close is China to a revaluation of its currency? The United States says its holding the rate with the dollar too low so China is exporting unemployment, but is Beijing's policy likely to change any time soon? The BBC's Chris Hogg met movers and shakers at a big conference on Hainan island south of Hong Kong. And why are prices are falling in the Land of the Rising Sun? Falling prices hit company profits in Japan, and by increasing the real burden of debt, they deter new investment too. But why is there seemingly little urgency to really tackle deflation? Ken Cukier, the Japan business and finance correspondent for The Economist, explains why. And Stephanie Flanders reports from Ireland on the pain and recovery of the Celtic Tiger. Plus, meteorologist Tamsin Gray describes her working life in Antarctica. On the lighter side, she outlines the joy of washing hair in temperatures of minus 50C, and holding it upside down so it freezes in a shock of long icicles. Show less