I would like to know if the following flight could work with the 72 hours visa multiple application

I'm flying to Beijing from Miami with an arrival on Monday the 24th until Tuesday the 25th (the same week).

on Tuesday i would fly from Beijing to Seoul and Then Come back from Seoul to Shanghai on Wednesday the 26th with a departure from Shanghai to Miami on the Friday the 28th.
Miami - Beijing Departure Sunday 23rd arrival Monday 24th
Beijing - Seoul on Tuesday the 25th
Seoul - Shanghai on Wednesday the 26th
Shanghai - Miami on Friday the 28th
With that Plan i will apply twice to the 72 hours free transit permission. Is it possible to apply two times in the same week in two different city that allow the 72 hours transit?
Thanks for you help
Best regards