Dongguan is generally safe for solo female travelers. Although the city is bustling and somewhat chaotic, serious crimes are relatively rare. As a foreigner, you might attract some attention, but it's usually just out of curiosity. As always, it is advisable to maintain standard safety precautions - avoid walking alone late at night in deserted areas, keep your belongings secure, and be aware of your surroundings particularly in crowded places. Hence, you should feel relatively secure while traveling through Dongguan.