72 hour transit /144 hour transit visa

We are due to fly from Uk to NZ with stop off of 84 hours in Beijing....are we able to get either of these visas to visit please? We arrive at 13.05 on the 28th Oct 18 and fly out at 01.05 on the 1st Nov 18 - We are finding it very confusing. Any help on how to go about it would be gratefully received xx