From his early age, Yun and his younger brother were famous for their great physical abilities.

[4] At the age of 17, Yun went to Seoul by himself and took the Gwageo Military Examination, and passed the exam, making him an official.

After the short-lived new government was formed, Yun was appointed as Minister of Justice, and Vice mayor of Seoul.

[6] On 30 September 1904, Yun was appointed as the Chief of Staff of Korean Empire[7] but he resigned on 30 January 1905 making him the last incumbent.

In modern Korean historiography, General Yun has been designated one of the Chinilpa or pro-Japanese activists of the 1900s (decade).