That is the main lounge as you pass through security.

Depending on your needs, lounge acces is pretty much meh imo. Unlike somewhere like T5 LHR which is in a habitual state of chaos and disorder, I have always found PEK departures pretty 'chilled out' as the kids would say.

Plenty of seating and cheap alcohol (why else do we use lounges?) available. And as alluded to , turn up as late as possible!