I am flying on YVR-YYZ-ORD on AC and connecting to ORD-TPE on BR. Will Air Canada check my bags all the way through to TPE, or will I have to pick up my luggage at ORD? Also, how does pre-clearance work for check-in luggage since if a transborder flight is treated as a "domestic flight" upon arrival in the US, will I have to send the bags through the transit luggage bag drop located outside of the baggage claim area?