Career
Wong Choong Hann"s career began with the 1996 Malaysia Open. He represented Malaysia in 2002, where Malaysia emerged runners-up to Indonesia in the Thomas Cup championships. In 2003, Wong Choong Hann reached the World Championships finals.
Wong Choong Hann played badminton at the 2004 Summer Olympics in men"s singles, defeating Przemysław Wacha of Poland in the first round.
In the round of 16, Choong Hann was defeated by Taufik Hidayat of Indonesia. The low point of his career occurred during the 2006 Thomas Cup where he injured himself by snapping an Achilles tendon while playing in a quarter final match against South of Korea, he was required to rest for almost 6 months.
He made a comeback to the sport in the Asian Games later in 2006 but was clearly far from his best form. He has set up a company "Pioneer Sdn Bhd" with former shuttlers Lee Wan Wah, Chan Chong Ming, and Chew Choon Engineer to conduct badminton programs and hopefully produce world-class shuttlers for Malaysia.
In May 2010, Wong Choong Hann was called back to play for the Malaysian Thomas Cup squad.
In 2011 he played his last world championship, where he lost to Boonsak Ponsana in the second round.