Nanjing is generally safe for solo female travelers. As a tourist, you are more likely to encounter petty crimes like pickpocketing and purse-snatching, especially in crowded areas. Violent crime is relatively low. Chinese people are usually welcoming and helpful to foreigners. Safety measures should include avoiding isolated areas at night and keeping a close eye on your belongings at all times. Nonetheless, it's always imperative to follow common safety precautions and remain aware of your surroundings.