Door-to-door selling detergent is fraud, and the principle is as follows.

One bottle of detergent, 60 yuan. Buy ten bottles and get four free. If you buy more, you can also send a gas card, get a discount, and do cleaning for free. In short, the discount is more than one. I think this is a good deal. I spent 1700 to buy 30 bottles. The salesman only issued a receipt to the victim and promised to deliver the invoice to the door in the afternoon, but the other party called in the afternoon and said that he could not go temporarily. All kinds of cleaning services are ruined. When encountering similar salesmen and sales methods, it is better to be vigilant and careful.