Is anybody stranded in Serbia?
Not me, friend.
Has more cash, cards (ATM and credit), phones (three) and data SIMs (told him to go out and buy some) for a month.
Told him to get two weeks food too before supermarket gets cleaned out, even tho he's still enjoying local restaurants.

Waiting for either border opening, HKSAR evacuation, PRC evacuation if he's allowed on that or UK evacuation (possibly, if his family can find his expired UK docs...)