It's no secret that late Hong Kong casino king Stanley Ho's 28-year-old son Mario Ho is a high-flyer. 

He won the Hong Kong national maths championship title twice and he entered Massachusetts Institute of Technology (MIT) where he finished a four-year course in just three years. He was also the youngest student in the history of MIT to graduate from the Master of Finance Programme. In 2018, his mobile game company, iDreamSky Technology, became a listed company in the Hong Kong Stock Exchange.