聯俄容共
In the winter of 1926, on the orders of the Chinese Bureau, Ji sailed to Europe to attend the League Against Imperialism, organized in Brussels for colonialized peoples by the Comintern agent Willi Munzenberg. In 1927, Ji married Harriet Levine in Paris, whom he had met on the boat to Europe. The Chinese Bureau of the CPUSA ordered Ji and a group of students back to China to take part in the revolution, but White Terror led by Chiang Kai-shek ended the First United Front, and the group went to Moscow instead.