Want to know how more trade with China will go? Just look at how it is now. 

We run a $45B/yr trade deficit with China.

Chinese businesses send tens of millions of items to Canadians through their postal system. The postage is subsidized by the state run postal system and by low wages for workers. The Chinese business pays a fraction of the amount that it costs Canadians to send a tiny package from one address in a province to another address in the same province!

When it gets here Canada Post, at significant cost to us, finishes the delivery at no additional charge. They do not collect duty and taxes that should be paid by the recipient.
So the Chinese business is subsidized by the government of China, then they are subsidized again by us (through Canada Post) and they don't have to collect sales taxes and duty. Now try sending that same package to China - it will cost an order of magnitude more than in the other direction.
How could Canadian retailers compete?