Question about another particular case

Hello!

Most of my questions are already answered by the detailed article and the other helpful answers in the comment section. Thanks a lot for that!
However, I have another edge case that I would like to ask about.

I am planning to buy 2 round tickets, as the price and timings are much better. The itinerary looks something like this:
1. Munich - Shanghai, with return Shanghai - transit in Beijing - Munich
2. Shanghai - Taipei and return

I am planning to visit Shanghai while on route to Taipei, but I don't plan to visit the second time, only change flights in the airport and return home.

The problem/question is with the "Key point" at the beginning of the article:
"Key point: The international flights flying in and out of China – from A to B and from B to C – should be non-stop, without a stopover anywhere in Mainland China."

B to C has another transit stop in Mainland China. Would this ruin my current itinerary even if I don't plan to leave the airport on the return route, this not applying for any visa free transit on return?
If yes, I must buy a direct return ticket, that will most probably be a few hundred euros more.

In any case, thanks a lot for all the details/answers from the article and comments, very helpful!