Sanmenxia is predominantly safe even for solo female travelers. The crime rate is low, and people are generally warm and welcoming towards foreign visitors. However, as with traveling anywhere, it's crucial to stay alert, be aware of your surroundings, and avoid wandering to remote or unpopulated areas especially at night. Keep personal belongings secure at all times from potential pickpockets. Language barriers can sometimes be an issue, so it may be helpful to have a translation app or travel phrasebook on hand.