How old is it to understand dreams?

I wonder if you will always think about the earliest scenes and events you remember, just like me? I read a piece of information that the brain structure of a three-year-old person can be developed to store long-term memories, and most of the previous memories are short-term memories. Before the age of three, it was the black box of human memory. No one can enter this black box and understand the inner world of the children in the black box. When children grow up, they don't remember what they experienced in the black box. For example, no one will remember sucking mother's milk as a baby ... I often trace back to my first childhood memories. After a long time, some fragmentary fragments are gradually strung together and clearly emerge in front of us. I wonder if it is a true representation of memory, an illusion of memory, or a dream? The earliest memory should be the scene when my father dressed me. When I was a child, most of the old houses in the north were heatable adobe sleeping platform. The kitchen stove is connected with the chimney on the roof through the flue of the heatable adobe sleeping platform, and the cooking fireworks are discharged along the flue under the heatable adobe sleeping platform to heat the bedding on the heatable adobe sleeping platform, so as to keep warm in winter and prevent moisture in summer. I remember standing on the kang and being dressed by my father. At that time, my mother seemed to be busy in the outhouse and made my father wear a cotton-padded coat, which was connected with his pants. The front and buttons are at the back, the trousers are open, and the cotton socks are sewn together with the trouser legs. I stood on the edge of the kang and looked up at the pocket of my father's coat. Father's height is about 1.7 meters, and the height of the kang is about eighty or ninety centimeters. Based on this calculation, my height may not exceed 60 cm. That height, wearing that one-piece cotton-padded jacket, is over one year old, and should not be more than two years old. Once again, my memory is one of the things I went to menstruation's house in Westinghouse. When I was a child, I seemed to like visiting. Aunt sat on the edge of the kang, opened a pamphlet, pointed to the illustrations on it, called my birth name and asked with a smile, "Look, what is this?" I remember that the illustration is in the middle of the right page of the book, drawing an upright figure similar to an ellipse, with some scars similar to cracks in the center of the figure and some roots around the ellipse. I answered without thinking: "big radish!" " "menstruation laughed after hearing this, called my uncle, and repeated the question and my answer just now. They smiled at each other and looked strange. I didn't feel right at that time. When I got home, I told my brother to go to menstruation's house with me again, expecting her to show it to us again. Aunt, it seems that it didn't happen just now. My aunt later had two sons, both younger than me. When I went to their house, there seemed to be no children. Presumably they are newly married and relaxed, so they will have a good time with their children. I was only two years old. Otherwise, adults will not show that kind of illustration to sensible children. The next memory is the stain I left on my father's cigarette bag. I remember my father smoking, but later he gave up smoking. I don't know when he resigned. At that time, the family was very poor and seldom bought cigarettes. Buy a box of cigarettes occasionally to entertain guests. Father smokes more "dry cigarettes", that is, unprocessed tobacco leaves. They are usually put in small cloth bags and put on the kang to dry. When smoking, take out a pinch of tobacco leaves and crush them, put them on small pieces of paper and roll them into awl-shaped cigarettes. I was wearing open-backed pants. Maybe my ass is not clean and I feel uncomfortable. I just sat on the cloth bag and rubbed it. Father found the stain on it, studied it carefully, looked at it with his eyes and nose, reached a conclusion and began to ask questions. Brother exposed that I did it. I know in my heart that I did something wrong. I was embarrassed and scared, and I cried on purpose. My father probably didn't blame me for being too young. I should be almost three years old then. Then, I remembered what happened before I was three years old-I was in the "black box" of human memory? ! After that, some memories in the morning are more clear and accurate, and obviously they have gone out of the black box of memory that people often say. The Great Leap Forward and iron and steel smelting were in 1958, when I was just three years old. A small ironforge was built in the courtyard at the east end of the street. The accumulated coke, raging fire, rolling smoke and molten iron left a deep impression on me. The raw materials for smelting are taken from scrap metal and other scrap metals handed in by various families. Later, more than 1000 pieces of scrap metal were smelted. I remember my mother took a screwdriver and led her neighbor's uncle to the house. She removed the copper handles on the wardrobe doors, high and low doors and drawers and handed them in, replacing them with straps and iron fasteners. After many years, where the handle is installed on the furniture, the color of the paint is still obviously darker than other places. The handle has been melted, but the shape is clearly visible. I remember it vividly. Why should furniture and hardware that are well used be taken down and melted again? At that time, I certainly couldn't understand such profound social significance. The high and low cabinets that have been used at home for decades are the dowry that grandma gave her mother and the main furniture that accompanied her mother all her life. When I grow up, that cupboard will still be there. The cabinet is painted in Bordeaux and has three drawers on it. There are household registration books, shopping books, rag needles, threads, brains and so on in the drawer. On the side panels on both sides of the drawer, there are crows when I was a child. Draw kittens, puppies, birds, the sea, warships, tanks, red flags, officers in big hats, etc. with pencils, pens or ballpoint pens. I remember standing and struggling when I was painting. I knelt on the chair and drew. Judging from the height of drawers and chairs, from the naivety of those paintings, especially from the fact that the hands and feet of the characters in the paintings are mostly single lines, I was at most three or four years old. When I was a child, there were no toys. When I am alone at home, I will slowly open the drawer and say, "Let's show a movie …" to enjoy the slowly emerging pictures. Do those unconscious smears in childhood indicate some ignorance in later life? ……