"Then" singing, Kin Phan Then Festival o the White Thai people in Muong Lay by Luong Thi Dai is a work that collects, translates and introduces the system of popular Then of the White Thai people in Muong Lay commune, Dien Bien province. Volume 2 includes the following contents: 1. Briefly introduction of "Kin Pang Then festival" of the White Thai people in Muong Lay commune (preparation of altar, offerings, instruments and costumes...); 2. "Then" songs of the White Thai people performed in "Kin Pang Then" festival, such as: Choose elephant choose horse, The ghost of village, Offering-Sharing Practices... The "Then" songs in the work are introduced in two forms of texts: Thai transcription and Vietnamese translation.