1938, Liu Xiao, former secretary of the CPC jiangsu provincial party committee and director of the Shanghai Bureau of the Central Committee of the Communist Party of China after liberation, also taught at Mellon.
1939, Mellon established the first underground branch in China, which grew to nearly 100 party member before liberation. Since 1933, Mellon's students have been an important force in the middle school students' movement in Shanghai. In War of Resistance against Japanese Aggression, a large number of Mellon students went to Yan 'an and other places and took to the front line of the Anti-Japanese War. Until liberation, in the history of 16 years, Mellon's teachers and students experienced the baptism of fighting, and the heroic deeds of "Eight Martyrs" were recorded in the history of the school, making the school a famous "democratic fortress" in Shanghai and Mellon students a "pioneer of student movement".
During the period of 194 1- 1942, Mr. Zhao Puchu, a famous Chinese social activist and calligrapher, taught Chinese at Mellon University and wrote inscriptions for his alma mater five times.
1953 After the founding of New China, the school was changed to a public office and renamed Jiguang Middle School.
In the early 1970s, the teaching scale of the school reached its peak, with nearly 4,000 students. After the Third Plenary Session of the Eleventh Central Committee, Jiguang Middle School has gradually recovered its vitality, and all its work is flourishing.