Of course, you have to arrange your own transfer to the hotel where you stay in Beijing, unless the airline specifically specifies the hotel arrangement when booking the flight ticket, so it is recommended that you make arrangements early.
You booked a connecting flight transfer product combined by Ctrip itself. The two flights belong to two airlines, and you need to go through the check-in and baggage handling procedures in the middle, which should not include accommodation. You can call Ctrip customer service to verify.