He is the only local driver to win the Macau Grand Prix twice, albeit in Formula 4 machinery.

[4] Charles Leong prepared for the 2021 Macau Grand Prix by competing as a guest driver in four FIA F4 China Championship races at the Zhuhai International Circuit held from 24 to 25 October.

[10] Wet conditions were encountered during the qualifying race, which Leong was able to finish third due to David’s non-classification.

[11] Positive momentum continued in the final race, which Leong finished second, behind his teammate Arvid Lindblad.

[12] In 2024, Leong made his first appearance with Miki Koyama in the Lamborghini Super Trofeo Asia with SJM Iron Lynx Theodore Racing.