Cannonballs can’t knock down the source of vitality like spring seedlings

My leader is my team. According to the general outline of the poem "My Captain, My Regiment", the source of the spring seedling-like vitality is the poem "My Regiment, My Regiment". "My Commander, My Regiment" is a novel written by Lan Xiaolong. It mainly tells the story of a group of defeated Chinese soldiers gathered in a shelter in the southwest town of Zenda at the end of the Anti-Japanese War. I have no fighting spirit and just want to live an ignoble existence.