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Usps container barcode

Hi I am trying to generate USPS container barcode. I tried with GS1-128 and some usps barcode formats, human readable area is correct but barcode is incorrect. What is the structure of usps CONTAINER barcode and/or which barcode format should I use ?
here is the explanation of usps container barcode.

@kaank

Are you getting an image like this.png (1.8 KB) using our web application? If not, please share the output you have got.