Natalis "Nat" Chan Pak Cheung, also known by his nickname "Smart", is a Hong Kong television host, film actor, singer and producer. Besides his duties as a variety show host, he has also been a horse racing commentator and horse trainer. In total, his horses have won 54 races, including the hard to achieve triple-trifecta six times. Around the turn of the millennium, he invested in Star East with Eric Tsang.