Co Noi is the intersection of National Highway 37 and National Highway 6, located in Co Noi commune, Mai Son district, and is a "throat" on the military marching route in the Dien Bien Phu Campaign. The campaign ended successfully thanks to the important contribution of the youth volunteer force. Hundreds of youth volunteers laid down their lives at this historical T-junction, beautifying the glorious golden history of the force.

In a solemn atmosphere, delegates offered incense and flowers to commemorate heroic martyrs, expressing their profound gratitude to those who devoted their lives for the nation’s independence and freedom, contributing to the historic Dien Bien Phu Victory which put an end to the country's long resistance war against the French colonialists.