Don Wineland, The Economist's China business and finance editor, discusses the alarming delisting of Chinese firms from U.S. exchanges and what it means for investors. Sarah Maslin, the Brazil correspondent, explores Bolivia's vast lithium reserves and the hurdles to unlocking their potential. Meanwhile, Matt Steinbach, the Europe correspondent, highlights the ongoing migrant crisis at the Polish border, interwoven with a Chopin concert aimed at bridging cultural divides. Each guest sheds light on pressing global financial and humanitarian issues.