Analysis of information sources in references of the Wikipedia article "Hong 10" in English language version.
Hong 10 (Hong-yul Kim, 39, KOR): Hong 10 is the oldest b-boy in this lineup and has been breaking since before some of his fellow Olympians were born.
And the oldest guy spinning around on his head in the circle was Hongten, who turns 40 years old in December. Hongten, whose real name is Kim Hong-yul, has been in the breaking scene for longer than some of his fellow Olympic B-Boys were born.
Hong-Yul Kim