In the end, the Deer Woman was brought back dangling from the Three-Headed Hound's mouth.
The moment she touched the ground, she ran off crying to take a bath. Well, as far as Li Wei was concerned, she had brought it on herself.
After dinner, Li Wei went to the study to chat with Ovelia. He had been planning to see her anyway, since he had brought her something good on this trip to Delicate.
"Plastic film?"
Ovelia paused at Li Wei's explanation.
"What is that?"
"Something that lets you grow vegetables even in winter. Put simply, you can think of it as flexible glass made from petroleum."
Just because Li Wei had been busy at the front did not mean everyone back home had been slacking off. For instance, the Holy Maiden had managed to produce the plastic film he had asked her to research.
And the raw material was, naturally-petroleum.
Petroleum had actually been discovered fairly early in this world, but it was nowhere near as important as it was in Li Wei's world. The reason was simple: coal essence produced an absurd amount of energy. Perhaps only nuclear fusion could compare. For most people, unless a material even more outrageous than coal essence appeared, petroleum and coal were not worth much attention.
The Empire currently had a few oil wells, though they were all open-air ones and saw little use. Most of the refined petroleum went toward mechanical lubricants, asphalt, waterproofing, and building materials. In other words, it was not useless, but it was not particularly important either-just an ordinary raw material.
As fuel? Hahaha, everyone knew petroleum could burn, but so what? Alcohol burned too. Did that mean they were supposed to run steam engines on liquor?
Of course, some people also claimed petroleum was the