[1] Passing the Gwageo literary exam in 1891,[2] Yi was posted to Seungjeongwon as a Ga Juseo.

[6] Being appointed as Special official of the Gungnaebu and Senior Imperial Appointee (4th grade),[7] Yi resided in the United Kingdom from 22 June 1902 to 2 July 1902.

He reported Gojong about the Niagara Falls, Red Sea, and Sri Lanka.

[8] After returning to Korea, Yi was appointed as the director of the Artillery in Ministry of Military,[9] contributing to the modernization of the army.

[13] On 22 April 1907, he received the rank of Major General with Yun Taek-young and Yi Gi-hong.