Chữ Hán
Chữ Hán (Vietnamese: 𡨸漢 [t͡ɕɯ˦ˀ˥ haːn˧˦] , lit. 'Han characters') are the Chinese characters that were used to write Literary Chinese (Hán văn; 漢文) and Sino-Vietnamese vocabulary in Vietnamese. They were officially used in Vietnam after the Red River Delta region was annexed into the Han dynasty and continued to be used until the early 20th century.