Dá hai is an art form performed on the folk stage by Nùng people in the eastern districts of the northern border. In the 1960s and 1970s, Dá hai drama had a strong development and many groups performing this kind of drama appeared. Dá hai drama had turned into a Nùng style from a form of puppetry Mộc Thầu Hý, a popular art form at village fairs in Cao Bằng Dá hai drama performs ancient stories, such as Phạm Tải - Ngọc Hoa, Hoa Mộc Lan tòng quân (Hoa Mộc Lan joined the army), Hoa phù dung, Tống Chân - Cúc Hoa, Lương Sơn Bá - Chúc Anh Đài, etc. Dá hai has many tunes, depending on content, themes, and details of characters that performers use—Sai va páo (playful, excited), sli páo, pìn táo (lyrical, romantic), cù táo (sad and mourning). The nhị (two-string fiddle) is always played as accompaniment in Dá hai. On a larger stage, Dá hai drama includes the accompaniment of a small orchestra consisting of nhị bố (two-string fiddle with a bass sound), nhị mẹ (two-string fiddle with delicate sound), cymbal, bamboo flute, and small drum. This track has excerpts of characters who, despite broken love affair, should not to be too sad but hope for a better future.

According to statistics data in 2009, the Cao Lan people (known as Sán Chay) in Vietnam had a population of 169,410 people, residing mostly in Tuyên Quang province. The Cao Lan ethnic minority has a treasure of poetry, folk music, and dance such as sình ca (unique folk singing), múa trống (drum dancing), múa xúc tép (small shrimp catching dancing), múa chim gâu (cuckoo bird dancing), etc. The musical instruments of Cao Lan people are various, including thanh la (small knobless gong), não bạt (small cymbals), drums, bells, and wind instruments. Kèn is a wind instrument performed in festivals and ritual forms. Kèn consists of four parts: the body, the bell, reed stake, and the reed. The body is a cylindrical hollow tube made of hard wood about thirty centimeters in length. On the body, there are seven pressing holes on the front and one hole on back near the stake. The instrument bell is made of a frustum-shaped thin wooden piece. The smaller of the bell is attached to the big end of the tube. The stake is attached to the small end of the tube. The reed is made of a reed pipe or worn nest attached to the stake. Its sound is strong, a little discordant at high pitches and a little cracked at the low end. The register of the instrument is two octaves. Kèn is played by men only. This track is a medley of extractions that are often played in the rituals, such as hành quân (army operation), kèn Khắp, and đưa Phật (Buddha greeting).