The first thing should be a happy dream, a dream caused by liking or happiness. There is joy in the heart, that is, there is a happy dream, and some people even wake up laughing in their dreams. Dreams are generally thought to be dreams caused by thoughts and memories. "Every night's dream is different. One day, with people and things, I thought of it. " Some people think that dreaming is not just dreaming of missing, but also thinking and thinking in dreams. The second thing is that I saw butterflies during the day.