You can get alot of info from the CBSA site Canada Border services, there is no duty for MFN, most favored nation, and China is one.
ARCHIVED - List of Countries and Applicable Tariff Treatments
You will however pay GST and PST, but only if it gets checked by customs, the vast majority goes through unchecked.
Large items may need a broker to clear customs and then it will cost, you can also clear your own if there is a CBSA/customs office where you move to.
Al.