Answered by ZUPAN
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Jul. 24, 2019 15:50
Your itinerary is eligible for visa free transit in China, but it has to fulfill several conditions:
- Your flight from UK to Shanghai should not have any additional landing in mainland China and Japan
- Your first port call, immediately after Shanghai, should not be in mainland China
- Your last port call, immediately before Shanghai, should not be in mainland China
- Your flight from Shanghai to UK should not have any additional landing in mainland China and Japan
I assume that you are fine with the above conditions and according to your description, I would say that you will use 144 hour visa free transit during your first stop in Shanghai and 24 hour visa free transit during your second stop in that city.
In case of force majeure, like serious illness, there are procedures that will allow to the sick person to be evacuated and properly treated. These procedures are covered by so called emergency visas. Don't worry, you will not need one :)