How is that SMS website made?

That's called SP, and it needs to cooperate with China Mobile or China Unicom.

The following is a detailed introduction:

SP is the abbreviation of Service Provider, which refers to the telecom value-added service provider, that is, providing services to users through the value-added interface provided by operators, and then the operators deduct relevant service fees from the users' mobile phone fees and broadband fees, and finally the operators and SP share them in proportion. From the perspective of enterprise business development, SP can be divided into three categories at present.

★ Portal SP is a short message service provided by portal website. Mainly Sohu, Sina, Netease and China. Com, Tom and so on. Its short message service mainly includes ringtones, pictures, short messages, news, games and so on. These services that need to be constantly supplemented are the specialties of these portal SP.

★ Professional SP is a company whose main business is SMS. Judging from the types of services provided, professional SP and portal SP almost completely overlap. But from the specific business point of view, the advantage of professional SP lies in the need for innovative technology and creative services;

★ The representative of special SP is Tencent. Unlike other SMS service providers, Tencent has no common services such as pictures, ringtones and games, and only focuses on its own QQ derivative SMS service with monopoly advantages.