The rise of the BRICS and its historical expansion unfold a new paradigm that offers a ray of hope, Senegalese President Macky Sall tells CMG's Wang Guan. He says people want change and he believes that joining the bloc will enable countries to be stronger together. It's a trend that cannot be stopped as countries in the Global South shouldn't be constrained by the old system. Sall reckons that Africa has a role to play in global development and that everyone stands to gain if Africa's economy is prosperous.