The first part is the natural segment from 1 to 3, the second part is the natural segment from 4 to 14, and the third part is the natural segment from 15.
The first part implies that volunteers are "the most lovely people", praising their lofty spiritual realm and expressing their incomparable love and reverence for volunteers. The second part shows the lofty ideological quality of volunteer soldiers with three typical examples, and specifically shows that they are our most lovely people. The third part is to appeal to people to love volunteer soldiers, and once again emphasize that they are indeed our most lovely people.