products are special, and others are being considered on the basis of safety. Three steps to judge security: 1. Don't listen to any individual or company saying security. I said that I have cooperation with the United Nations. Do you believe it? 2, don't look at the so-called manufacturer official website, a website is only a few hundred dollars. Be sure to check UnionPay and the People's Bank of China yourself. It is related to money. Only these two places are credible.