I'm assuming the "File Date" means it was filed for in April and...

I'm assuming the "File Date" means it was filed for in April and the "Pub Date" means it has now been accepted and consequently published?

I haven't been keeping track, but presumably some of this work (for these patents) dates back to early in the year and is only now filtering through?

Ergo, a lot has been going on and we are now being caught up, thanks to your monitoring of the Chinese patent authority, and no thanks to our trusty and diligent communications team at AP.