What are the front and back supplements of the newspaper?

Main problem: The newspaper pages that mainly publish news reports and comments are called main problems. Supplement: a fixed page in a newspaper that reflects society and literature with a strong literary genre and can give readers beautiful enjoyment. Published regularly, usually with a title. The following are giveaways: special issue: a newspaper uses articles to elaborate news events and social hotspots, expound theoretical viewpoints and introduce various knowledge. Published regularly, usually with a title.