Best of: Desperate for a dream - Why some Chinese migrants cross the US border

Last year, 2.5 million migrants entered the United States illegally via its southern border with Mexico. Nearly 40,000 of them were from China. What did Beijing's zero-Covid policy have to do with this? Teresa Tang speaks to CNA's Wei Du about her documentary, Walk the Line.   See omnystudio.com/listener (https://omnystudio.com/listener) for privacy information.