Not sure if you have reached China yet…but they too will want to invade your privacy in every which way possible. word to the wise, have your hostels pre-booked for everywhere, all your travel details established (train/plane etc) for all your destinations on the mainland, and your information available for entering and exciting the country by plane. They will also want all your families info too…worst experience obtaining a visa for me ever. On the flip side, vietnam is amazing and relaxed when applying for visa’s. Cambodia you can get a visa for 20 bucks American right at the airport in Siem Reap…I would assume this is your Cambodian entry point?! Good luck and hope this info reaches you before you have gotten there…if not, you will already know all this 🙂