An Alibaba sub-account opened by an enterprise user on Alibaba Group's platform to assist in managing stores and conducting business operations.

Here are the steps to set up and use an Alibaba sub-account:

1. Log in to the main account: First, you need to log in to the main account of the Alibaba Group's platform.

2. Enter the sub-account management page: In the menu above the homepage, find the "Sub-account Management" entrance and click to enter.

3. Create a sub-account: In the sub-account management page, click the "Create Employee" button and fill in relevant information, such as sub-account name, login name, mobile phone number, etc.

4. Assign permissions: Assign corresponding operation permissions to your new sub-account. You can assign different permissions to employees based on their responsibilities, such as product management, order management, customer service, etc.

5. Verify mobile phone number: After the sub-account is successfully created, the system will send a verification SMS to the mobile phone number bound to the sub-account. Sub-account members need to verify their mobile phone number to activate the account.

6. Sub-account login: Sub-account members can use their login name and mobile phone number to log in to the relevant websites or mobile applications of Alibaba Group's platforms.

7. Multi-person collaboration: In the sub-account management page, you can view and manage the information of all sub-accounts, including modifying account information, assigning permissions, deactivating or deleting accounts, etc.

Please note that the Alibaba sub-account system is designed to help corporate users better manage stores and business operations. To ensure the security of corporate assets and information, please make sure to follow Alibaba's relevant policies and regulations and assign appropriate permissions to sub-accounts.