The đàn tính, or tính tẩu (gourd lute), is a stringed musical instrument from tianqin (Chinese: 天琴; pinyin: Tiān qín of Zhuang people in China, imported to Vietnam by the Tày people of Lạng Sơn Province in Vietnam.

[1] In 2007, Vietnam's Ministry of Culture, Sports and Tourism submitted a plan to promote the instrument, as well as the "Then" style of singing that it often accompanies.

[4] A seminar recommended that traditional songs be transcribed and recordings made, and that local art schools provide instruction in this type of music.

The head of the lute is carved into the shape of a phoenix, handsome seal, sun or moon, and a wooden peg is placed on the left and right.

The headstock is flat-topped, the tube is made of Gastrodia elata bamboo or iron, round, 10 cm in diameter, with silk or nylon strings.

A woman named "Tianpo", wearing a long skirt and a beaded cap, played and sang with a lyre in her hand.