When you purchase a CU resource plan from Function Compute, you will receive a free service identification number with which you can apply for Internet content provider (ICP) filing.
If you use the same Alibaba Cloud account to purchase a cloud service instance and apply for ICP filing, you can directly select the instance in the ICP application without needing to apply for a service identification number in advance. The system will automatically generate a service identification number for the instance. For more information, see the instructions on the Alibaba Cloud ICP Filing system.
If the Alibaba Cloud account that you use to purchase an instance is different from the Alibaba Cloud account that you use to apply for ICP filing, you can refer to (Optional) Authorize another Alibaba Cloud account for ICP filing.