Baggage transit at PEK

I will be travelling through PEK enroute from Bali returning to Canada. I fly into Beijing via Singapore Airlines and depart on Air Canada.

From reading the questions here I believe I do not need a visa or to change terminals. I have about 2.5 hours between flights.

How do I confirm that my baggage will get put on my Air Canada without me having to pick it up and check it in? Thank you!