1h20 connecting time coming from Munich (Lufthansa) to Beijing Capital Airport.

And leaving for Hongkong (Cathay)
Hello,
I am wondering if 1h20 connecting time in PEK is enough.
I will arrive from Munich with Lufthansa and leave for Hong Kong with Cathay Pacific only 1 hour and 20 minutes later. I guess I have to go through immigration, get the luggage and check it in again as both flights will be booked separately.

Thanks so much for your advice, very appreciated.