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

Here is Why You Need An Adapter

The outlet and plug type used in Hong Kong is G and in Central African Republic are C and E. This is how they look like.

Central African Republic

In Central African Republic, outlets of type C and E are in use.

Type C

Type E

Hong Kong

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

Type G