(dajiang song "turn east", a dense group of families will help the poor. Ten years of broken walls, it is difficult to reward the sea and be a hero. What does this poem mean?

After experiencing the fierce struggle of the May 4th Movement in China, Comrade Zhou Enlai deeply felt that the country must have advanced science and technology in order to make progress and development, so he made up his mind to travel across the ocean and seek advanced scientific knowledge in order to serve the motherland. Here I quoted the story of facing the Dharma Wall for ten years, which showed my firm determination and long-term determination and looked forward to the future. Even if my ambition is difficult to realize, I am worthy of being a hero. Those who give up their lives for righteousness are also.