Ruijie#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Ruijie(config)#split interface hundredGigabitEthernet 0/54
%Warning: please save configuration and restart the device for the configuration of spliting interface HundredGigabitEthernet 0/54 to take effect!
Ruijie(config)#exit
*Sep  5 09:32:13: %SYS-5-CONFIG_I: Configured from console by console

Ruijie#write

Building configuration...

[OK]
Ruijie#
Ruijie#reload 
Reload system?(Y/N)y

Press RETURN to get started