Send coupons+trinkets. Customers who are willing to go to beauty salons hope that the price will be lower. You can get a discount of 8.8 or 9.5. Because of the greedy and cheap mentality, it can be seen everywhere, and there are reasons for discounts in shopping malls. Then send them a small wearable video, such as a key chain or a mobile phone band, which can capture customers' hearts without spending a lot of money. Why not?