Connecting flight in Beijing capital airport

You need to go through the immigratio in Beijing.
If you use the connecting flight to Wuhan, you can check in your luggage all the to its destination. If you have your luggage checked-in to the destination, you do not need to pick up the luggage at the BJ airport, otherwise, you need to pick up.
For the luggage problem, it is suggested to consult with the airline company directly to detail information.