Does the co customs code of the commodity inspection bureau

In the past, the customs code of CO certificate of origin in the CCPIT was displayed with 8 digits. But recently, the CCPIT system always had problems, so I applied for a co certificate of origin from the entry-exit inspection and Quarantine Bureau. When I input the customs code, I also displayed 8 digits. But today I went to print the original CO and found that there were only 4 customs codes on the original Co. could you tell me about the co certificate of origin customs of the commodity inspection bureau Does the code display only 4 bits?