Direct selling is a way to distribute goods and services by eliminating middlemen, reducing the cost of products in circulation and meeting the needs of customers to maximize their interests. Xi An Niu Da Health Management Co., Ltd. is mainly committed to the direction of big health industry, and strives to build professional health public welfare workers to help and serve people in need of health through remote health management, thus creating an ecological environment of big health and neglecting entrepreneurship. This business model is different from direct selling.