Air China has changed my PEK connection from 5 hours to 29 hours! I was originally booked on a dirt-cheap Y ticket arriving at PEK around 8 AM on 11 June, then departing to IAD at 13.25 (CA817). Apparently CA817 no longer flies on 11 June, so CA rebooked me on CA817 on 12 June. So... am I now entitled to a hotel room? Or can they rebook me on their codeshare operated by UA (UA808) later in the day on 11 June? I actually don't mind spending a day in Beijing IF CA gives me a free hotel room.

EDIT: One more question: will CA still be able to check my luggage through to IAD, or will I need to retrieve them at PEK and re-check them in?