He started to play darts in 2014, entered competitions and become one of Hong Kong’s top players. At the end of 2015, he quit his job to take up darts full-time. In 2017, he qualified for the
UK Open, losing in the first round. He then represented Hong Kong in the
World Cup of Darts alongside
Royden Lam, but they lost out in the first round to the Russian pairing of
Boris Koltsov and
Aleksandr Oreshkin. Leung won the 2017 North & East Asia Qualifier for the
2018 PDC World Darts Championship, where he lost 2–0 to
Paul Lim in the preliminary round. Leung won a two-year PDC Tour Card on 17 January 2020, beating
Lisa Ashton 5–4 in the play-off match at UK Q-School. He became the second Hong Kong player to qualify for the Professional Darts Corporation (PDC) ProTour. In 2022, Leung was runner up at the 2022 Isle of Man Masters, losing to
Ryan Hogarth of Scotland 4-5 in the Final. He won the title at the WDF Swedish Open 2022, when he triumphed in the final with 5-1 against
Alexander Merkx. In the
2023 WDF World Darts Championship, Leung made his debut at the Lakeside. He competed in the second round against Swiss player
Thomas Junghans. Leung started by winning the first set 3-2, capitalizing on Junghans’ missed doubles. However, Junghans improved his finishing in subsequent sets, ultimately defeating Leung 3-1. In 2024 Leung continued playing mainly in WDF events and made his semi-final appearances at events like the Bruges Open and Belfry Open in 2024, and took victory at the Irish Classic. Leung competed again in the 2024 WDF World Darts Championship at the Lakeside and started in the Second round as a seeded player against
Paul Lim. Despite a strong performance with an average score of 87.44, Leung was defeated by Lim in a five-set match, ending 3-2 in favor of Lim. ==Personal life==