Entry Twice

I have a plan to purchase a return flight from Manchester to Beijing, spending 5 days there when I arrive through the 144 Hour Free Transit. Then a return flight to Seoul from Beijing (say for a week or so) and then plan on returning to Beijing for 5 days (Use the 144 Hour Free Transit for a second time) and flying back to Manchester with my original return flight. Does this conflict with the 144H free transit?