A leisurely life in

"Comrade Li Yuan, please explain the mechanism behind women's menstruation.",Across the table stood a tall and slender young man, around twenty years old. He was handsome with a humble and gentle gaze, though lacking the youthful vigor and ambition that one would expect of someone his age in this era...,It can store 404 tons of water, or 210 tons of flour, or 674 tons of rice...。