Hán-Nôm is a writing system used in Vietnam that combines two scripts: Hán and Nôm. The Hán script is derived from Chinese characters, while Nôm uses these characters along with additional symbols to represent native Vietnamese words. This system was essential for literature and administration in Vietnam before the adoption of the Latin-based Quốc Ngữ script in the 20th century. The use of Hán-Nôm reflects the historical influence of China on Vietnamese culture and language. Many classical texts, poems, and historical documents were written in this script, showcasing the rich literary heritage of Vietnam. Today, Hán-Nôm is studied by scholars and enthusiasts interested in preserving