I also received a purifier from Shenzhen Fast Retailing Technology, which also said that it was exchanged for points. It's not a fraud company, is it

It won't lie. The redemption of points is actually your consumption, and the bank will give you points. If you spend too much, you can go to integral mall in the bank to buy gifts. This way of exchanging points is what every bank is doing. Fast Retailing Technology should be a service provider of banks, which generally requires higher qualifications. You exchanged something at the bank, and the bank asked Fast Retailing Technology to deliver it to you. It is a very correct operation! The supplier of this bank can't be fake, and how strict the bank's risk control is.