is this covered by a 72 hours free transit?

Question

Hi,French passport, traveling in China for about 15 days with a valid visa. I'll leave mainland to go to Hong Kong. But my flight to leave Asia is from Shanghai. So my question is: can i take a flight from HK to Shanghai and, on the same day, from Shanghai to the US? Would it be okay to re-enterfor few hours (I wont leave the airport but ill have to pass the immigration to check in again).Thank you very much for your help!!

Edison · Answer

Emilie, I am afraid that you can't do this. Even the immigration officer doesn't check your flight ticket for HK, you still can not pass the checkpoint to go back.

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Is this covered by a 72 hours free transit?