When nationals with HHR leave Taiwan for a long period, say more than a year, they are supposed to move out their HHR (~deactivate HHR: 戶籍遷出國外 in Chinese). If they don’t their HHR will be automatically deactivated after 2 years.
The HHR may be conected to NHI, but you need to confirm.
Overseas Chinese” status may be mostly to avoid conscription for young male nationals.
To reactivate a HHR(辦理遷入or恢復戶籍), you need a proof of address again.
As for the address, if you can borrow your extended relative’s address, transcript of the HHR and the relative’s permit can be the proof of the address.
yes, imo
Some sites in Chinese