Now every platform sells education. If I think it is necessary, I can go there to buy Taobao flagship store, which is also a big platform. Audiences all over the country spend money there. I think it's quite reliable. If necessary, I can buy it directly. And now everything is free of postage, and I am not afraid to buy fakes. If I buy a fake, I can get a refund. It's cheap, and it's also a discount for a specific person.