Later, he returned to Korea and became an assistant professor at Seoul National University College of Engineering.

After the outbreak of the Korean War, he moved to Busan and built a network with various artists, including Kim Whan-ki and Lee Jung-seob.

[1] In 1952, he was selected as a Korean delegate for the first UNESCO International Conference of Artists, which took place in Venice, Italy.

During his stay in Venice, he had the chance to meet with Le Corbusier, the renowned Swiss-French architect.

This meeting led him to work in Le Corbusier's atelier in Paris for three years and two months.