1. Vancouver airport is a "US domestic airport" or US Port of Entry.
2. you don't need any Canadian visa if you go through Vancouver airport
3. go to china follow the sign of International Flights
. back from China: follow the sign TO US and you will enter a area for US flights. the flight landing in US at domestic area(not international area).
4. you need a Canadian visa only if you want to stay Canada for short time
2. you don't need any Canadian visa if you go through Vancouver airport
3. go to china follow the sign of International Flights
. back from China: follow the sign TO US and you will enter a area for US flights. the flight landing in US at domestic area(not international area).
4. you need a Canadian visa only if you want to stay Canada for short time