1933, when the Japanese invaders invaded North China, Wu Mai destroyed his family to ease the plight. In addition to peacefully dissolving his engagement with his wife and sending his eldest son under the command of General Zhang Xueliang, he also went to Feng Yuxiang and asked to join the first batch of anti-Japanese death squads. However, Feng Yuxiang disagreed. He gently advised Wu to go abroad and used his reputation to publicize and organize patriotic overseas Chinese to support the domestic war of resistance. Wu Mai agreed.
1936, after hearing the news of the "Xi incident" that shocked China and foreign countries, he immediately returned to China from Singapore and went to Xi 'an on behalf of Mr. Li Ji. But some people in China don't want or like his coming back. Before leaving, he was killed by a mob.
Wu Maisheng, who was born honest and detested evil, was a group without party affiliation and devoted himself to serving the country. Although he was persecuted several times in prison and wanted several times, his fighting spirit was particularly strong. It was once called "Firedart Lawyer" and "Wu Cannon" by Chinese and foreign newspapers and periodicals. During his lifetime, he left magnificent patriotic poems and stone carvings in Guilin, Yangshuo, Taishan, Lushan, Zhenjiang, Xiamen, Hangzhou and other places, accompanied by the magnificent rivers and mountains of the motherland for people at home and abroad to mourn. His posthumous works include Wu Mai's Travel Around the World and Wu Maiwen's Collection.