In the summer of 1970s, rural boys swam without underwear. In the summer of 1970s, boys under the age of 8 in rural areas swam without underwear, so they needed cloth tickets to buy cloth, and their clothes would be mended if they were broken. At that time, most of the little boys swam barefoot, showing their buttocks. When they reached the river, they clung to telephone poles or dried stones. In the 1970s, most of the houses were tiled houses, and the hospitals were relatively small, selling and hawking on the roads. At that time, there was little money, tickets, food stamps, oil tickets and cloth tickets. The most popular thing in those days was a simple and generous blue coat.