npub17883e4e53zt45f8sc52fprjwqaheppyr7yln4p30drp9xd36ge3snw9nku (npub1788…9nku) I know this for quite some time, since the PRC did hire and pay folks in HK to do so.
And they were in the midst of open-sourcing 90nm and working on 65nm in 2015.
AFAIK most of the key people fled to the EU when Beijing decided they wanted to violate the Joint Sino-British Declaration and cancel the few Freedoms Hongkong had before 2047.