古文 vs. 文言文 (wényánwén): You will often see the term
文言文 (wényánwén), which also means “Classical Chinese.” For a beginner, they are virtually interchangeable. Technically, 文言文 is a broader, more academic term for all forms of pre-modern literary Chinese. 古文 can sometimes refer more specifically to the prose style advocated during the Tang and Song dynasties that emulated even more ancient texts. In everyday conversation, however, people use both terms to mean “Classical Chinese.”