
I have a complicated open jaw ticket
Moscow - Guangzhou, Beijing - Moscow on the same itinerary
Now, when arriving in guanzhou, I'm boarding for Vietnam. I'm in Vietnam for a week, and I'm reentering Guangzhou to make my way to Beijing to fly Moscow.
Q1. Do I need an entry permit because I'm doing an internal flight Guangzhou - Beijing?
Q2. What if my return open jaw is Moscow - Guangzhou - Beijing - Moscow but in between I get out of guangzhou to vietnam right away and re-enter china via a direct flight to Beijing from a 3rd country, say Malaysia, will I need an entry permit?
Q3. If I enter Tianjin from Singapore but my flight out of China to Russia is out of Beijing in 24 hrs, do I need a visa to take a train from Tianjin to Beijing or can I use the 72 hr transit free since its in the same region?
Q4. For the 72 hr transit, do I need to notify the airline in advance or I can just arrive in Guangzhou and get free transit at the airport?
Sorry for many questions