"Comrade Li Yuan, please explain the mechanism behind women's menstruation.",The young man shook his head with some shame. "My fur isn't even enough to talk about, I've only superficially learned three volumes of the Nine Stages Diagnosis Method.",Even for ordinary citizens of the capital, before the issuance of five-year promissory notes in 1955, commodity circulation was relatively smooth. Chicken, duck, fish, meat and flour were all available to those who had money.。