Traveling between the 70s and the modern world

Lin Qingyan was reborn, in the second year of her childhood sweetheart's rural youth education. After waking up, she stayed away from the scumbag and tried to use her years of knowledge to get rich and go to college. What? There is another space? Mysterious well water and a door that leads to the 21st century. Let's see how she plays with the 70s and the 21st century. Vegetables that could only be exchanged for things in the 70s were snatched up in modern times, and unsalable goods in modern times were also snapped up in the 70s. Lin Qingyan happily ran back and forth between the two worlds. While making a fortune, she did not forget to bring her relatives and friends to make a fortune together. A certain educated youth looked at her pitifully: Comrade Qingyan, you are busy...