Caixin China Biz Roundup: Hong Kong Stock Exchange Sees Record Earnings

In today’s episode: Hong Kong bourse's strong performance in first quarter was fueled by a surge in trading and public listings; a knife-wielding man attacked at least 16 children and two teachers at a kindergarten, local media reports; and ticket prices for flights from China to the U.S. skyrocketed as the American government eases travel restrictions on students from the Asian nation