1922 (Republic of China 1 1 year), Europa returned to China, and before he was 30 years old, he became the department head and general manager of Xiamen University, making unremitting efforts to revitalize Xiamen University. He is upright and upright. When he learned that the school had unreasonably expelled several students, he stood up to defend himself, but he was expelled early on the pretext. There was a protest on campus, and many students angrily signed their names and left the school with him.

Afterwards, the students who left school asked him to take the lead in setting up a new school. Unable to bear the pain of students dropping out of school, Ou stepped forward and founded "Daxia University" in Shanghai with nine famous people such as Wang Yuxiang and Lin Tianlan, professors of Xiamen University. Ma, a famous educator, was appointed as the principal of the new school and formulated the school motto, requiring teachers to study hard, students to study hard and staff to work hard. He also went with Ma to Malaysia, Singapore and other places to raise a lot of school funds.