Money that is easy to earn is not clean, money that is clean is hard to earn, money that is easy to earn costs other people's lives, and clean money costs one's own life. They say that the right path in the world is the result of vicissitudes of life, but who knows that behind the vicissitudes of life are all wounds. The lights of thousands of houses produce smoke, and the firewood, rice, oil and salt are another day. The human world is not a pure land, and everyone has his or her own suffering. We are both sad guests in this mortal world, don’t laugh at who is the poor one!