He is 3 weeks younger than Jo Hoon-hyun when he joined the team at 9 years and 7 months, and is a new record for the first time in 63 years.
The average age of joining a professional knight is over 15 years old.
Even geniuses like Lee Sedol and Shin Jin-seo, who appeared after the modern Baduk system was established, joined the game at the age of 12 or 13.
Child Hajun Yoo announced the emergence of a genius three years after learning Baduk.