Where can I find the business serial number?

For China Mobile customer inquiries and unsubscription services, you can edit the text message 0000 and send it to 10086. You can quickly query the various monthly value-added services that your mobile phone account has ordered so far. Customers can send instructions according to the prompts. By replying to the text message, you can easily select the corresponding business serial number to freely unsubscribe from one or more subscribed monthly value-added services (except for services that cannot be unsubscribed due to signing of an agreement or other reasons). Unsubscribing from the service requires a business serial number. The red box in the figure is the business serial number. Please reply to cancel according to the message content prompts received.