For this reason, many shops have portable generators.
According to government estimates Vietnam sees 3.3m tourist arrivals each year.
It is very difficult for them to trade without negotiating 'fees'.
At various points during these thousand years of imperial dynasties, Vietnam was ravaged and divided by civil wars and repeatedly attacked by the Songs, Mongols, Yuans, Chams, Mings, Dutch, Qings, French and the Americans.
The victories mostly belonged to the Vietnamese but, even during the periods in history when Vietnam was independent, it was mostly a tributary state to China until the French colonisation.
US economic and military aid to South Vietnam grew through the 1960s in an attempt to bolster the Southern Vietnam government, escalating into the dispatch of half a million American troops in 1966.
What was supposed to be a quick and decisive action soon degenerated into a quagmire and US armed forces were only withdrawn following a cease-fire agreement in 1973.
Vietnam (Việt Nam), officially the Socialist Republic of Vietnam (Cộng hòa Xã hội Chủ nghĩa Việt Nam) is a long, thin country in Southeast Asia.