You Do Need power plug adapter while traveling from Dominican Republic to Hong Kong.

Here is Why You Need An Adapter

The outlet and plug type used in Hong Kong is G and in Dominican Republic are A, B and C. This is how they look like.

Dominican Republic

In Dominican Republic, outlets of type A, B and C are in use.

Type A

Type B

Type C

Hong Kong

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

Type G