PROBLEMS ENCOUNTERED BY VISITORS TO HANOI
1. Taxi airport :
Electricity is 220 volts and 50Hz. Plugs are often either two squarepins or two roundpins. Three-pin plugs can be found in some certain places.
You should bargain when you shop in local markets. For example, if the shop owner says 100 dollars, you should ask for 40, and then work for an agreement from there. If negotiations are not working, start to walk away and in the vast majority of cases, the shop owners will call you back and give you their best price.
The traffic in Hanoi is amazing but also seems scaring. There is plenty of traffic particularly during rush hour (7am to 9am and 4.30pm to 6.30pm). Try to stay off the roads in that period or take into account that travel at those times will take longer. When crossing the road, do not make the sheer numbers of motorbikes overwhelms you, just walk slowly and carefully.