I took the last Air China out of HKG to PEK (local time Friday night), the airport was packed; more than a typical Friday evening at HKG. People were trying to get out before the typhoon hits. My flight was supposed to be a light-load flight but ended up fully packed with last minute expatriate traffic to PEK to escape the storm. Not sure I would pick PEK as a desirable place but flights to more attractive locations in Southeast Asia and Japan were all fully booked.
I was supposed to take the Saturday morning UA flight to SFO out of HKG, but an extra meeting took me to PEK and now I am happy to be on the PEK- SFO scheduled later on Saturday.