The Tao Te Ching (/ˈdaʊ ˈdɛ ˈdʒɪŋ/ DOW DEH JING), also known by its pinyin romanization Dao De Jing, is a Chinese classic text traditionally credited to the 6th-century BC sage Laozi. The text's authorship, date of composition and date of compilation are debated. The oldest excavated portion dates back to the late 4th century BC, but modern scholarship dates other parts of the text as having been written—or at least compiled—later than the earliest portions of the Zhuangzi.