This work is difficult to do, because the effect can't be seen in a short time, even if the effect is obvious again, it will take a long time. I once worked as a customer service in a place selling early education products, but it was difficult to get any results. Although mothers cherish the baby's education time, they can't tell clearly, which is the habit of consumers. For example, celebrities must be very easy to do, and this kind of thing must always persist at the beginning, and it will only be effective if it lasts for a long time.