1. Check the publishing contract: When signing a publishing contract, the payment method and time of the publishing fee are usually agreed. Therefore, you can check the relevant clauses in the publishing contract to understand the details of the page fee.

2. Contact the publishing house: If you are not sure about the payment method of the page fee, you can contact the financial department or editorial department of the publishing house to understand the relevant situation and pay according to the requirements of the publishing house.

3. Pay by notice: Some publishing societies send a notice to the author or agency to pay the publishing fee after the book is officially published, indicating the specific amount and payment method. If you receive such a notice, you can pay as required.