Alibaba's evaluation system can be modified or explained, but the specific operation process may vary depending on different situations.

If you are a buyer, after making an evaluation for the seller after the purchase, if you want to modify or delete the evaluation, you can follow the steps below:

1. Go to the "My Taobao" page, find the corresponding order and click "Evaluation and Order".

2. Find the evaluation you need to modify or delete in the evaluated order and click the corresponding operation button.

3. If you want to modify the evaluation, you can modify and save it in the pop-up edit box; if you want to delete the evaluation, just click "Delete".

If you are a seller, after receiving the buyer's evaluation and find that there are inappropriate comments or misunderstandings, you can also explain it through the following steps:

1. Find the corresponding order on the "My Taobao" page and go to the "Evaluation Management" page.

2. Find the evaluation that needs to be explained and click "Add Details".

3. Fill in the details in the additional details section and submit, and wait for Alibaba customer service to review and display it below the original comment.

It should be noted that any operation on the Alibaba platform must comply with the platform's relevant regulations, and be careful about your words and attitude.