China says its troops stationed in port can build "new" contributions to maintaining prosperity and stability

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

China PLA troop and armored trucks getting into port on early morning of August twenty nine standard time - "routine"

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

China says has completed troop rotation for HongKong

says its forces in HK can build even additional vital "new" contributions to maintaining HK's prosperity and stability 

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