config setup
        interfaces="ipsec0=eth0 ipsec1=eth1"
        klipsdebug=none
        plutodebug=none
        plutoload=%search
        plutostart=%search
        uniqueids=yes

conn %default
        keyingtries=0
        authby=rsasig

conn denet-cn
        left=10.1.10.50
        leftsubnet=192.168.10.0/24
        leftnexthop=10.1.10.1
        leftid=@de.exemplify.com
        leftrsasigkey=0sAQNv7EnikLXTl...
        right=10.126.5.241
        rightnexthop=10.126.5.1
        rightid=@cn.exemplify.com
        rightrsasigkey=0sAQN9oqZTrwju...
        auto=add
For @cn.exemplify.com, you would have the following:
config setup
        interfaces="ipsec0=eth0"
        klipsdebug=none
        plutodebug=none
        plutoload=%search
        plutostart=%search
        uniqueids=yes

conn %default
        keyingtries=0
        authby=rsasig

conn denet-cn
        left=10.1.10.50
        leftnexthop=10.1.10.1
        leftsubnet=192.168.10.0/24
        leftid=@de.exemplify.com
        leftrsasigkey=0sAQNv7EnikLXTl...
        right=10.126.5.241
        rightnexthop=10.126.5.1
        rightid=@cn.exemplify.com
        rightrsasigkey=0sAQN9oqZTrwju...
        auto=add