The army leader heard this and asked, "What do you mean?"
"There are so many cattle and sheep on the grassland, we need to dig more reservoirs to store water, and plant some trees, which can be useful at critical times," said the superior leader.
"You can go back and sort out this idea. There are excavators and transport vehicles, which can benefit future generations anyway." The superior leader continued.
The army leader nodded and then said, "OK, I'll go back and check it."
When the army leader left, the superior leader carefully looked at the data again and found that the most important thing in this rocket design was a small lead