Hong Kong visa

The visa is issued to citizens and residents who come to China for tourist purposes.

Visa for Saudis:

 Saudis can visit Hong Kong for a period not exceeding 30 days without a visa.

For other nationalities:

They can apply via the link 

Macau visa

 Citizens of the United States, Canada, Portugal, and some other countries enjoy visa-free entry to Macau for tourism purposes. Please visit the Macau Public Security Police Force website for details