Originally Posted by
Scifience
You don't mention your citizenship, but I'm going to assume US since you're based in HNL. If this is the case, the bolded segments are fine for 72 hour TWOV at PVG. If not a US citizen, double-check that your nationality is eligible for 72 hour TWOV. Almost all nationalities are eligible for at least the standard 24 hours.
More importantly, with a transit of four hours, virtually any airline will know about the 24 hour transit without visa and board you under that. The biggest hurdle in the 72 hour transit without visa if your itinerary requires this rule is that airline staff may not know about it, understand it, or believe that it is possible.