if they gonna bother u about the over weighted luggage, you can pull out ur ticket from YVR, and tell them u're fly from/to Canada, and explain the luggage allowance is 32*2. most of the time you'll be fine, no need to worry about it. Remember they dont understand English well enough, and they dont wanna make any foreigners sad, usually they'll let u walk away with extra allowance. if all these doesnt work, the last trick is smile and show ur maple leaf flag. Chinese ppl love Canadians. i can almost guarantee u this will work.