If you see Hong Kong from the mainland of China and desire to come back to the mainland, you're require a visa that enables you to earn a second entry into China. You are able to also submit an application for a long-term Visitor in Transit visa if you're able prove you will need to frequently pass through the united kingdom over a lengthier period. An e visa is necessary for travel to Uganda. Any other passenger who does want to leave the airport will require a UAE entry permit. That means you