"You will notice how his style was more conservative. The orderly depiction of the cathedrals and residences in Britain, his first stop in Europe, are a contrast to the rapid free strokes and colorful rendering of the buildings in Germany, where he was inspired by Bauhaus architecture and modern glass-structured buildings."

Tong Jun ended his tour earlier than planned to take on the role of a teacher at Northeast University in China for an autumn semester. When the Japanese invasion forced the architecture department to dissolve, he moved to Shanghai, and together with Zhao Shen and Chen Zhi, founded a studio called Allied Architects. The studio later expanded its practice to Chongqing and Guiyang, Guizhou province.