If you are an international traveller this is one big pain in the butt, all the different types of sockets used around the world, and then the different voltages. Aggghhh!
Fortunately, with China it’s not too difficult, so let’s take a deeper look.
There are five types of sockets in use, one in Hong Kong/Macau, two in Taiwan, and the other two on mainland China.
Hong Kong Power and Macau Socket and Plug
In HK and Macau they use a UK style plug, completely different to the mainland China. If you land in HK without and adapter they can be a tad expensive from stalls in tourist areas, I found simple ones at Mong Kok computer market for 15HKD that worked a charm.