Poetic couplets (Câu đối) by Nguyễn Văn Ngọc (pen name Ôn Như) is a collection and study of one of Vietnam’s distinctive forms of folk literature — the câu đối (parallel couplet). In the preface, the author affirms that câu đối is not only a concise, rhymed form for honing intellect and language skills, but is also deeply embedded in cultural life, from the royal court to rural villages, appearing on occasions such as festivals, Lunar New Year, birthday celebrations, funerals, and home decorations.