Does it cost money to cast a screen in Zhu Hua app?

Zhu Hua app is a software that provides hotel reservation service, which can help users quickly find and book their favorite hotels. In addition to the basic hotel reservation function, Zhu Hua app also provides many extended functions, including screen projection function. The screen projection function refers to projecting the screen of a mobile phone onto a big screen such as a TV or a computer, so that users can watch the content on the mobile phone on a larger screen. In Zhu Hua app, the screen projection function needs to be used by members, and it needs to be paid.