How is steel tempered? Comments on Chapter 12

Chapter 12 of How Steel was Tempered reads as follows:

In order to supply urban timber, a railway was to be built within three months, so Paul and the Communist Youth League members were transferred to repair the railway.

The working conditions of the road construction team are very difficult, and it rains continuously. The workers were frozen at their feet, their soles were broken and they had to soak barefoot in the biting mud.

The harassment, illness and hunger of armed bandits also threatened Paul and his comrades. In the face of extremely bad weather and hard working environment, Paul and the workers are still working hard in the snow and ice.

The railway was finally completed as scheduled, and Zhu was deeply moved by their revolutionary enthusiasm. From Paul, we can see a spirit of selfless dedication to the progress and liberation of mankind. The spirit of fearless, enterprising, endless and unremitting struggle is still the strongest voice of the times.

We should do something beneficial to human development and progress. Looking back, we don't regret wasting our time, nor are we ashamed of being mediocre.