支系

branch or subdivision of a family

surname Zhi

to support / to sustain / to erect / to raise / branch / division / to draw money / classifier for rods such as pens and guns, for army divisions and for songs or compositions

to connect / to relate to / to tie up / to bind / to be (literary)

system / department / faculty

to tie / to fasten / to button up

to connect / to arrest / to worry

subsystem