Every year, when spring and the Tet  holiday come, if you go on an excursion to highlands and the northern mountainous provinces, you will be glad to see blooming peach trees and plum and to discover the mysteries in the Hmong minority’s customs and habits, to welcome New Year, usually celebrated in early January in the lunar calendar.

The Tet holidays last 12 days, with many community activities, and the most typical is the Gau Tao festival, one of two important events each year to…