Abstract: Proposed is a method for product recommendation by a server. The method may include receiving a gift recommendation request from a first user terminal for a second user, checking available basic information of the second user, and determining a first recommendation information based on the basic information, wherein the first recommendation information comprises a first recommendation reason and at least one product related to the first recommendation reason. The method may also include determining a second recommendation information not based on the basic information, wherein the second recommendation information comprises a second recommendation reason and at least one product related to the second recommendation reason. The method may further include providing recommendation information comprising the first and second recommendation information to the first user terminal. The first recommendation information may be prioritized for display over the second recommendation information.

Abstract: The present application provides a polyamic acid aqueous solution composition prepared of a polyimide, wherein the composition enables the polymerization of hydrophobic-based monomers into a polyamic acid in water and is improved in transparency, eco-friendliness, storage stability, and the like when cured.

Abstract: A method and apparatus for a payment service are disclosed. A method of operating a server providing a payment service includes obtaining country-related information of a terminal connected to the payment service. The country-related information of a terminal may include a country code the number of the terminal is assigned to. The method includes providing an international credit card as an option for a payment method to the terminal based on the country-related information. The method includes checking whether an account corresponding to the terminal is authenticated. The method includes determining a default value of a payment method corresponding to the account based on whether the account is authenticated.