Later, after Li You-pang took part with other students in an attack on a Japanese police station, he was expelled from college and a warrant issued for his arrest. He then fled to mainland China, where he joined in China's struggle against Japan.
之後，李友邦與同學襲擊日警派出所，遭開除學籍及通緝，便輾轉逃到大陸參加祖國抗日戰爭。