Despite the survelliance, Yun continued his activities and was appointed chairman of a Farmers' Association. Promoted through the Suam Sports Council to improve the health of farmers, he also created rural sports clubs because he believed that rural development and the spirit of national independence could be achieved through having a healthy mind and body. By 1930, after establishing two more rural athletic associations for the nationalist movement, Yun decided to go to China because of the harsher Japanese crackdowns on the independence movement.