Yinchuan is generally considered safe for solo female travelers. It's a medium-sized city in China with a relaxed atmosphere, friendly locals, and a good level of safety. However, like everywhere else, it's always important to maintain awareness of your surroundings, especially when traveling alone. Don't flash expensive items in public, and keep your belongings secure at all times. Unwanted attention can occur occasionally, but it's usually not a major problem. Despite the language barrier, the people are helpful and the police are reliable. It is suggested to have a translation app to easily communicate.