I m a Chinese and got immigration to Canada but somehow i found my passport is about to expire. I m planning to visit there for one month and come back to China and later go back to settle to canada. So this time my passport will expire when i stay in Canada for one month so what is teh best option for me.

Today: 14 April, 2010... Planned visit from May 1 to june 1
Passport expire will on May 5th
Got Immigration visa for Canada

What i should do now? Should i fly to canada and apply for a new passport in Canada? In this case can airline or chinese immigration officer will allow to fly? what about canadian Immigration?

Thanks for help
sam