Frankfurt (Germany) -> Shanghai -> Seoul and then the return

Your web-site provides the detailed information about new China's 144-Hour Visa-Free Transit option.

Would you please advise, if I have route:

Frankfurt (Germany) -> Shanghai by Lufthansa airline, here I would like to use new 144-hour option to stay in Shanghai, then will fly further Shanghai -> Seoul (S.Korea) by Asiana airline (stay time in Seoul - 2 days). And then the return will be Seoul -> Shanghai by Asiana airline, and Shanghai -> Frankfurt (Germany).

Would you please kindly help and advise if such route will be eligible for a 144-Hour Free Transit in Shanghai.