21:06Newshour25/09/2021 20:06 GMT: 'Hostage diplomacy' as China and Canada swap prisonersBBC World Service Duration: 50 minutes Sat 25th Sep 2021, 21:06 on BBC World ServiceChinese Huawei executive and two Canadians return home. Show more GenresNewsFormatsMagazines & ReviewsBrandNewshour Source: BBC Online