You Do Need power plug adapter while traveling from Canary Islands to Hong Kong.

Here is Why You Need An Adapter

The outlet and plug type used in Hong Kong is G and in Canary Islands are C, E and F. This is how they look like.

Canary Islands

In Canary Islands, outlets of type C, E and F are in use.

Type C

Type E

Type F

Hong Kong

In Hong Kong, outlets of type G are in use.

Type G