Do I need to change Hong Kong dollars to travel to Hong Kong and Macao?

The RMB is appreciating now. You don't change money. Welcome to use RMB for consumption in Hong Kong and Macao. Merchants will not refuse. It's just that they will trade with you at a very low discount, and you will suffer in the end. If you shop a lot, you will lose a lot of money! Therefore, it is more cost-effective to exchange RMB in advance after arriving in Hong Kong or Macau. Try not to change money at Luohu port or airport, because the exchange rate monopolized by these places is very low, and you will suffer. So you should change it in the city. You can find money exchange shops in the streets and alleys of Hong Kong, which is very convenient.