China says its troops stationed in Hong Kong will make "new" contributions to maintaining prosperity and stability

I posted earlier on what was deemed a 'routine' rotation of Chinese troops in HK:

• China PLA troop and armored trucks entering Hong Kong on early morning of August 29 local time - "routine"

Xinhua (this via Reuters) now report the movement is completed:

• China says has completed troop rotation for HongKong
• says its forces in HK will make even more important "new" contributions to maintaining HK's prosperity and stability

OK …. the "new' contirbutions …. that sounds innocent enough … but is it?