step 1
1.on qnap install container station
2.open container station
3.click create container
4.find centos
5.click install
6.all default is ok
7.click adcanced settings
8.go to Network
9. set port forwarding for Qnap host to vm
host 8388 container 8388 tcp for SSS (可改你自已想要的port for SSS)
10.click create