Traveling through the 1970s with the Museum of the Times

Disclaimer: not my story and i'm just posting
Introduction

　　The display cabinet of the Museum of the Times contains 200,000 yuan worth of the third set of RMB issued in 1962;There were hundreds of different ticket types used in the 1960s and 1970s;
The national food coupons exceeded 10,000 kilograms!
All kinds of commodities from that era filled up the "supply and marketing cooperatives" and "department stores" of all sizes...
Yin Yuyao drooled at the display case and dreamed: If this was brought back to the 1970s, it would have been a huge success.
　As a result, she traveled through time in the next second...
Yin Yuyao burst into tears: I was just thinking casually, don't take it seriously!

　　****

　　Yin Yuyao traveled to the 1970s with a huge amount of cash and abundant supplies, but the outstanding and proud original owner died because of her stepmother's withholding of food and a high fever.The most infuriating thing is that the stepmother took the money left by her mother, wore her mother's clothes, lived in the house built by her mother, and abused her two children. She also wanted to trick her out and sell her to an inhumane man as a wife.
Yin Yuyao: Oh, I can't stand your bad temper.She cursed her own father and reported her stepmother, and while taking revenge on the original owner, she also did not forget to hand a beef bun to her little follower brother, saying, "Sister will bring you wealth and glory in the future."
Twenty years later, my younger brother handed me a bag of documents and said, "From now on, I will take you to the top of the world."
Note: My dear brother, don't think wrongly.
Note: The story is set in the 1970s, please do not verify the facts, it is a personal setting and is mainly for fun.
Content tags: Time and space romance, wealthy family, time travel , farming, cool, daily life
Main characters: Yin Yuyao, Pei Yunsheng
One sentence introduction: The invisible tycoons in the 1970s　Concept: The colorful 1970s