洛阳纸贵 (Luò yáng zhǐ guì): lit. paper has become expensive in Luoyang (because everyone is making a copy of a popular story); fig. (of a product) to sell like hotcakes
洛阳纸贵
lit. paper has become expensive in Luoyang (because everyone is making a copy of a popular story); fig. (of a product) to sell like hotcakes
A poem was copied so widely that it drove up the price of paper in the capital. For the book, song or post that everyone is suddenly passing around at once.