He was known as being a progressive thinker and for his opposition to the formalism and ritualism in the predominant philosophy of Chu Hsi.

Yun Chung refused government office because he thought the Korean monarchy was corrupt, and spend his life teaching Sirhak ideas.

"[1] Yun held ideological debates with Song Si-yeol, known as the Hoeni Sibi (懷尼是非,"The Right and Wrong Between Song and Yun"), over the matters of ritualism and politics.

[2] Yun may also considered an early feminist, as he praised and honored female scholars of Confucianism, a position that was typically reserved for males.

[3] He came from the Papyeong Yun clan (파평 윤씨; 坡平 尹氏).