Yang gropes for a balanced conversion in his outlook to embrace macro and micro viewpoints that incorporate his thoughts about the world as an individual in society. And here a doubt works as a concrete condition to find out about human’s inborn psychology and attributes by narrowing the distance to the world. The artist describes that the most doubtful situations are the relationships involving numerous people in society. Such diverse human relationships create systems of social structure such as customs, ethics, and regulations to sustain the relationships, and that becomes an interesting doubt.