My friend got the 144 hour free transit with a third region onward travel, then back to Shanghai,

and back to her home country. However, since getting the visa she doesn't need to go to travel anymore. Can she stay in Shanghai and return to her home country after? This would mean that she went home country -> Shanghai -> home country, which wasn't her intention when she got the visa. Does she need to somehow fly out of the country and back in to keep this third region onward travel commitment?