Haiphong is generally safe, even for solo female travelers. Although the city tends to be peaceful at night, navigation might be tricky due to less street lighting compared to western standards. The locals are very friendly, and serious crime is rare. However, as with any other big city, it is advisable to exercise basic safety precautions, especially at night. Avoid walking alone in unpopulated areas or dark alleys, keep your belongings secure, and avoid showing off expensive jewelry or gadgets. Make sure to use licensed taxis for transportation and don't share them with strangers.