Maybe it's not worth waiting through a compulsory quarantine of between 14-21 days (depending on where our presenters would be flying in from:

https://www.coronavirus.gov.hk/eng/inbound-travel.html#quarantinemeasures2

And don't forget - shipping our samples to China for the purposes of demonstration means they will be locked up in the Customs office for a long enough time for them to "study" the product. 

I'd say this is the far better and safer way to demo at this point.