What does Man Jianghong mean to commemorate the 80th anniversary of the May 4th Movement?

It means 80 years. "Man Jianghong Commemorates the 80th Anniversary of the May 4th Movement" is the title of a poem, which means to commemorate the 80th anniversary of the May 4th Movement through this poem. The May 4th Movement is an important patriotic and democratic revolutionary movement in the modern history of China. 19 19 broke out in Beijing on May 4th, marking the beginning of China's new-democratic revolution. 80 years, that is, 80 years, refers to the history from the outbreak of the May 4th Movement to the 80th anniversary. By reviewing and thinking about the May 4th Movement, this poem expresses respect for revolutionary martyrs and hopes for a new era.