HKG-HGH-PVG-HND

Thank you for this post, it's very informative!

I would like to double check that I got it right and that I can indeed use a 144-hour free transit.
I'll be arriving in Hangzhou from Hong Kong on a Saturday evening, taking the train to Shanghai, and leaving from Shanghai PVG on Monday morning at 1am to go to Tokyo. I'll be in China just over 24h and I have a French passport. It's OK to arrive in HGH but leave from PVG, right?

Thank you very much!