Good to read that are you working on getting back to China. Hard to say at the moment whether BA will be running some flights to PKX - my guess is not, but if the rules are opened up to allow more flights they may run a limited service to take advantage of cargo loading..

There are though some scheduled flights now from Europe at least to Beijing - specifically I think from Denmark and Sweden or Air China. A friend (Chinese, with overseas-passport but long term spouse Chinese visa) is booked to fly to China at the end of this month - and is currently scheduled to land at PEK, so assuming that happens I can get back to you and add some details of the overall process and quarantine experience.

The authorities here though have also stated though that in the case of more than three imported cases on any flight will result in immediate diversion - which I doesn't quite make sense to me, as testing only takes place after landing, so I presume this just means that subsequent flights will be rerouted back to an alternative port of entry, so there are no solid guarantees at the moment about these flights.