Stupid chinese parts

"Somewhat high" charging voltage is almost never a bad regulator. It's usually voltage drop in the harness or ground circuit.

"Very high" that is out of control voltage which goes up with RPM to over 16 could be a failed regulator.

I agree. Sometimes it not the assumed cheap part when it comes to electrical woes. If you have bad wiring and or poor grounds, the charging system will suffer and eventually fail.