The festival brings together the 12 best flute teams in the northwestern region.
The panpipe is a musical instrument played by ethnic minority people in northern mountainous provinces like Lao Cai and Ha Giang.
It is a wind instrument made from six to twelve or fourteen small bamboo pipes tied together and connected to a wooden sound box.
This instrument is very popular with a number of ethnic groups in Viet Nam, such as the Thai, the Muong and the H'Mong.
By Vien Nhu