Hong was part of the KCF Young Stars Program, run by former World Champion Garry Kasparov.

In September 2021, Hong defeated Ian Nepomniachtchi and Wesley So at the PRO Chess League Arena Royale.

Hong later earned the title of Grandmaster after achieving his final norm at the Charlotte Chess Center & Scholastic Academy Labor Day Norm Invitational in North Carolina.

[5][6] In December 2023, Hong played in the World Rapid and Blitz Chess Championships.

[8] During the seventh round of the Blitz championship, Hong complained that he lost on time despite pressing the clock after making a move in his game against Yu Yangyi.