There he was stopped in the first round of the Bantamweight (54 kg) division by Uzbekistan' Alisher Rahimov.
Later Jo won the bronze medal in the Featherweight (57 kg) division at the 2003 World Amateur Boxing Championships in Bangkok.
He qualified for the Athens Games by winning the silver medal at the 2004 Asian Amateur Boxing Championships in Puerto Princesa, Philippines.
He is currently serving as an assistant coach of the South Korea national boxing team.
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