If you describe the efforts of predecessors and outstanding successors.

1, the waves behind the Yangtze River push the waves before, and the new people in the world chase the old ones.

2, predecessors planted trees, and later generations enjoyed the cool. Only by working hard and struggling hard can we make good use of the wealth left by our predecessors to future generations.

On the way forward, there are always people who pay silently. They are role models for the younger generation and they are also role models for the younger generation to learn.