Yes, it is legal for them to provide e-commerce websites, the law recognizes and supports this kind of behavior, and any country will vigorously advocate this convenience procedure, because it has a great effect on the economic development. All courses on our platform follow the charter. Our purchase target is adults over 18 years old who have rational judgment and will not be misled into buying. At the same time, we also provide 7 days of reasonable and legal return service to protect the rights and interests of customers. We always put the interests of our users first. You can check out our website for more details.