In this world, people come up with all kinds of schemes to solve the problems of energy and reproduction.
A certain powerful nation proudly showed off its treasures: "To become the strongest nation, you need both energy stones and golden lion blood. Fortunately, I have both."
A certain nation's marshal scoffed: "What's so special about that? I have an energy-stone locator and live golden lion blood, female and capable of bearing cubs."
Someone said coldly, "Father, that's my wife, not yours."
The marshal fell silent...
Then he immediately changed his tune: "None of that matters. We have a daughter-in-law, so we can get whatever we want!"