In the modern city, the “day ”means to be occupied, our free time is deprived of tedious study and work, and the originally full mental state of the heart is also withdrawn by the heavy reality.Only at night, time is our own. Dim and fuzzy things give us an ambiguous feeling because of all their mystery, and this part of the ambiguous strangeness is not perceived by us during the day. The darkness of the night is like a veil covering things, which is wrapped in the fantasy of the world they leave us, and we fill the empty spirit in this private fantasy.