Can I Use US$ In Beijing And Hong Kong?

of these While both of these places have their own currencies , they welcome Us dollars, but to get the right exchange rate you should change in advance, because not everyone in shops and hotels can exchange for you or give you a good rate.
The best is to use a credit card and just take a small amount for taxis or tips and telephones. That way you don't have to change back again when you leave.
Hong Kong now part of China, is fascinating although an expensive city to visit. here is some information to help you. Hong Kong island's northwester coast is also the centre of economic activities. Hong Kong has an excellent natural harbour and is one of the world's major trade and financial centres. It has many educational institutions, including the University of Hong Kong, plus great shopping and world class hotels and restaurants many of which are expensive, but do not compromise on service or quality.