Quan họ, often referred to in English as "Quan Ho folk songs" or simply "Quan Ho Singing," is a traditional Vietnamese music genre that originated in the Bac Ninh province of northern Vietnam. Recognized by UNESCO as an Intangible Cultural Heritage of Humanity, Quan Ho is performed as a unique form of vocal duet between male and female singers, typically during spring festivals and communal gatherings. The songs are characterized by their intricate melodies, poetic lyrics, and the soft, emotional exchanges between performers. Each performance not only showcases musical skill but also reflects deep-rooted customs and social connections within Vietnamese communities.

The art of Quan Ho focuses on themes such as love, friendship, and the beauty of nature. Singers are often dressed in traditional attire, with women wearing graceful "ao tu than" dresses and distinctive flat hats known as "non quai thao," while men don formal tunics. The dialogic nature of Quan Ho singing involves call-and-response sequences, where one group initiates a song and the other responds with a matching tune, sometimes improvising lyrics to continue the exchange. This creates a lively and interactive atmosphere, fostering bonds between performers and the audience alike.

For generations, Quan Ho has been passed down through oral tradition, serving as both entertainment and a means of cultural preservation. Today, many local communities actively promote Quan Ho through festivals, contests, and educational programs, ensuring its legacy endures among younger generations. The significance of Quan Ho goes beyond mere singing—it embodies the values of respect, solidarity, and hospitality that are cherished in Vietnamese society. As Quan Ho folk songs become increasingly known worldwide, they continue to testify to Vietnam's rich cultural heritage and artistic finesse.