Germany -> Beijing -> Hong Kong -> Beijing -> Germany

Hey,

I am a German citizen.

At the moment I am working in Beijing. I have got a single entry visa which is valid until 15th of April.
I want to make holidays in Hong Kong for a week from 21th till 28th of March and then fly back to Beijing and use a 72h transit to reenter Beijing. There I will get my left stuff and fly back to Germany on 29th of March.

Is it possible for me to use the 72h free entry?

Thank you.