NOTE: AA moved to T2 in late 2017 - this resulted in no access to any T3 lounges (including CX) - we are having to use the Air China (CA) lounge in T2 which is only run as a contract lounge as they have no flights in T2
The T2 lounges are pretty bad - T3 isn't much better (few exceptions on a few lounges).
T2 Air China lounge (used by AA as the contract lounge - even though CA is based in T3 they still operate a lounge in T2) - no showers, pretty dire food - you are better off hanging out at the Starbucks - the choices post security at PEK aren't great for T2
My image from the PEK
Air China PEK T2 Lounge
Entryway to T2 Air China lounge at PEK