The dead son should be Rong Jie's only son, and "Dao" happens to be the same age as Rong Jie's son. Being with Sister Rong made up for the loss of a child to some extent.
These words may have been said to my own son who was going to war, but they all made the same choice.
The experience of "knife"
People like "Dao" will not change out of thin air. Their passion is deeply buried in his bones and blood, and instantly rises from loyalty on rivers and lakes to national feelings.
The blade cut his thumb, pressed the bloody handprint on his life and death, and shouted his name with his fist. The "knife" flew on the bridge, ran and fell down, then got up and continued to run.
He successfully threw the telephone line to the soldiers, but fell in a pool of blood.