Taobao 38 event (i.e. Women's Day promotion on March 8th every year) is usually an event in which merchants participate, and consumers cannot cancel the event of the entire platform. However, if you mean to cancel the order participating in the event, then you can follow the steps below:

1. Open the Taobao app or website and log in to your account.

2. Go to "My Taobao" and find "Purchased Products" or "Order Management".

3. Find the order participating in the 38 event you want to cancel in the order list.

4. Click the "Refund/Return" button next to the order.

5. Select the refund reason according to the page prompts, fill in the necessary information, and submit the refund application.

6. Wait for the merchant to review the refund application. If the merchant agrees, the order will be canceled and the corresponding amount will be returned to your payment account.

If you are a merchant who wants to cancel the product participating in the 38 event, you need to contact Taobao customer service before the event starts to understand whether you can withdraw from the event and the relevant rules and procedures. Usually, exiting an activity may require meeting certain conditions and may be subject to certain penalties or restrictions.

Please note that the specific operation steps may change with the update of the Taobao platform. It is recommended to operate according to the latest interface guidelines. If you have any questions, you can directly contact Taobao customer service for help.