Virtual machine communication in different network segments of centos

I read the tutorials on the Internet and added routes, but I didn"t get it done, so the latter brazenly asked the bosses:
ip information and routing information of device 1

eth0      Link encap:Ethernet  HWaddr fe:fc:fe:3c:8d:db  
          inet addr:172.16.200.10  Bcast:172.16.203.255  Mask:255.255.252.0
          inet6 addr: fe80::fcfc:feff:fe3c:8ddb/64 Scope:Link


Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
172.16.200.0    *               255.255.252.0   U     0      0        0 eth0
loopback        localhost       255.0.0.0       UG    0      0        0 lo

ip and routing information for device 2

eth0      Link encap:Ethernet  HWaddr FE:FC:FE:97:0C:DC  
          inet addr:200.200.123.7  Bcast:200.200.123.255  Mask:255.255.252.0

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
200.200.120.0   *               255.255.252.0   U     0      0        0 eth0
169.254.0.0     *               255.255.0.0     U     0      0        0 eth0
default         200.200.123.254 0.0.0.0         UG    0      0        0 eth0

for example, what should I do if I want both parties to be able to communicate with ping?