Hi Jie Bai,
I already referred note 1557674, but I couldn't get you by method what you are expecting.
I've created ZC128A with below details :
Bar Code Symbology Code 128
Bar Code Alignment Normal
Narrow Module Width 06
Linear Height 00150
Code128 Mode: A
Also as citizen is not included in SAP printer vendor program, I've assigned standard SAPWIN device type.
Thanks and regards,
Nikhil