Oilfield gathering and transportation stations face the problems of high oil content, severe emulsification, and low solid-liquid separation efficiency in crude oil produced water. The customer hopes to find an efficient flocculant that can quickly aggregate tiny oil droplets under high temperature and complex water conditions, enhance demulsification and sedimentation effects, and improve water clarity and treatment efficiency. At the same time, in order to control operating costs, the customer requires the product to have good economy and compatibility, be able to work seamlessly with the existing system, and support large-scale continuous addition.