President Trump’s ban on Harvard University is just one move on a broader crackdown on international students. At the end of May, Secretary of State Marco Rubio issued a press statement, singling out Chinese students, saying the administration would ‘aggressively revoke’ visas, with no details as to when or how this would happen. Banning students from studying in America could open opportunities for other countries, as CGTN’s Jen Copestake reports.