Manila to Beijing (PEK), Beijing (PEK) to Pyongyang / Pyongyang to Beijing (PEK), Beijing to Dublin

Hi, I will soon be doing a tourist trip to North Korea for 5 days. I want to avail of the 72 hr transit visa at Beijing twice.

First leg: I fly from Manila to Beijing and the next day from Beijing to Pyongyang. 5 days on a group tour of North Korea.

Second leg: I fly back into Beijing and one day later I fly to Dublin via Moscow.

Can I avail of the 72 hour free transit on both occasions?