P1, P2, P3, P4. The products involved in the human resources simulation sand table are set as a virtual product, i.e., PP series products, which can be divided into four kinds of P1, P2, P3 and P4, of which, P1 is a low-end product, P2, P3 is a mid-range product and P4 is a high-end product. Human resources refers to a number of people with the ability to work labor, the need for a job can be a resource, the company from the big data to extract the professional aspects of their own needs.