洛陽紙貴

lit. paper has become expensive in Luoyang (because everyone is making a copy of a popular story) (idiom) / fig. (of a product) to sell like hotcakes

surname Luo / old name of several rivers (in Henan, Shaanxi, Sichuan and Anhui)

used in transliteration

Luoyang prefecture-level city in Henan, an old capital from pre-Han times

positive (electric.) / sun / male principle (Taoism) / Yang, opposite: 陰|阴[yin1]

paper / CL:張|张[zhang1],沓[da2] / classifier for documents, letter etc

expensive / noble / precious / (honorific) your