When shopping, what are the wonderful experiences that you will never forget?

The happiest shopping time was when I was a soldier in Baotou, Inner Mongolia, and I sent a liberation truck with the regiment to buy coal for the company to keep warm for the winter. The car goes out of Kundulun District of Baotou to the north and passes through the rugged Daqing Mountain, which is a sparsely populated and endless grassland. The car was driving on the grassland, raising a cloud of dust. Finally, we came to a small village with only a dozen adobe houses. Two villagers came over and took us to a small pit. Looking down, there are piles of anthracite. Looking ahead, there are many similar pits. There are piles of lump coal under the pit, some of which are still burning spontaneously in flames. According to the negotiated price, the villagers helped to fill up the car, with 8 yuan money per ton. Such a good smokeless lump coal is really much lower than the price of tens of yuan a ton in the city at that time. When they left, several women and children came out of the village, carrying their own chickens and asking us for a kilo of rice, because most people living in this remote and sparsely populated place have never been to the city or eaten. They want to taste the rice. It happened that we had some rice in the car, which met their requirements and exchanged a catty of rice for a catty of chicken. This should be the happiest shopping I have ever experienced and the most cost-effective one.