Memory can be improved by training. At all times and in all countries, many celebrities and scholars pay great attention to exercising their memory in various ways. For example, Tolstoy, a great Russian writer, said, "I do two kinds of exercises every day, one is morning exercises and the other is memory exercises. I recite foreign words every morning to check and cultivate my memory." Tolstoy's "memory exercise" is actually a repeated "representation". As long as you "reproduce" in a planned way, your memory will be enhanced.