Not necessarily. In some mobile reading applications, the per-chapter fee was deducted from the data fee instead of the phone bill. This was because pay-per-chapter applications would usually deduct the corresponding fee from the user's traffic when the user read the chapter. This kind of charging method may cause some financial pressure on users, so some mobile reading applications will provide another way to charge, such as through a one-time payment or a one-time payment. However, there were also some mobile reading applications that directly deducted the cost of charging by chapter. In this case, the mobile operator would usually deduct the corresponding phone bill according to the package selected by the user before charging the user a fee according to the chapter. Therefore, users needed to choose a package that suited their needs when purchasing mobile reading applications to avoid unnecessary financial burdens.