At that time, China was facing an unprecedented national crisis, and War of Resistance against Japanese Aggression, the long and arduous people of China, was about to begin. The poet Ai Qing keenly felt the current turbulent atmosphere. A struggle between blood and fire is coming! It is the poet who wants to eulogize the sons and daughters of China who are about to devote themselves to this cruel war of defending the country and defending the country. It is their wave after wave that has brought brilliant "smiles" to our beautiful life today. Ai Qing, a poet, feels extremely honored and proud that he can devote himself to this torrent of fighting for the nation. At that time, the Chinese nation was already in a national crisis. The Japanese invaders invaded Northeast China and are invading North China. This is the eve of the July 7th Incident, and the whole country is in a tense atmosphere. Outstanding poets are generally philosophers. Perhaps they have a better feeling than ordinary people: a nationwide struggle against the blood and fire of invaders is coming, and poets are keenly aware of the need to summon a great force to fight.
The poet wrote the poem "Laughter", which not only has specific reference, but also has macro penetration. In other words, the poet wrote the history of human progress and the great struggle between justice and injustice. In this great struggle, there are "countless brave" heroes, and poets are eulogizing them.