In general, the demand for products comes from four aspects: market demand, user needs, their own needs and the needs of the boss. 1. Market demand: From the perspective of the current situation or future trends, grasping the current and future situation, the products or business person can make their products take fewer detours. In market research, the company needs to open up a new product line. In the early stage, market research is needed, and the demand comes from market research results. Or a product strategy developed through competitive product analysis, copying or micro-innovating a product of the same type, such as the recent selection of fires, and various xx choices of imitations. 2. User requirements: More from the face-to-face interviews, online and offline feedback or the conclusions drawn from the questionnaires, these methods are the current means of contact with users. 3. Boss needs: This is more complicated, sometimes it is sometimes wrong. The boss's pattern is high