---
[prod-servers:children]
us-servers
cn-servers

[us-servers]
50.18.17.9 ansible_ssh_user=centos region=us
13.57.176.83 ansible_ssh_user=centos region=us

[cn-servers]
117.50.108.62 ansible_ssh_user=root region=cn
117.50.106.64 ansible_ssh_user=root region=cn