There seem to be a few airports in China missing from Simbrief that now have very nice sceneries made for them for MSFS, notably ZUDC (highest altitude airport in the world for commercial flights) and ZUBD. Would it be possible to add them to the database so that users could plan flights into and out of these airports? (Or is it possible for users to add missing airports themselves?)
To your specific question:
Yes, when you can offer us the data, we are happy to add it as tailored records - the data must be in the ARINC424 format please. You can send it to me in PM if you like. Thank you!