On the Alibaba platform, if your main picture is stolen by others, you can appeal.

Here are the specific steps for appeal:

1. Collect evidence: First, you need to collect evidence to prove that you are the original author or owner of the picture. This can include the original picture of the photo, the design draft, the copyright registration certificate, etc.

2. Report infringement: On the Alibaba platform, you can find the "Report" button and click it to enter the report infringement. Fill in relevant information, such as the link of the infringed product, the infringing picture and your contact information, and upload the evidence picture.

3. Wait for the platform to handle: After submitting the report, the Alibaba platform will review the evidence you provide. Once the review is passed, the platform will take corresponding punishment measures, such as deleting the infringing product and punishing the infringer.

4. Appeal: If the infringer is dissatisfied with the platform's handling results, he can appeal. You need to pay close attention to the message notification of the Alibaba platform and submit the appeal materials in time after receiving the appeal notification.

5. Submit appeal materials: During the appeal process, you need to provide relevant evidence such as the original picture, shooting time and location, etc. for the platform to verify. At the same time, you can invite industry experts or lawyers to provide you with professional advice and support.

6. Wait for the platform's decision: Alibaba platform will review your appeal and make a final decision. If the platform determines that you are the original author or owner of the picture, the infringement will be punished.

Please note that you need to be patient during the appeal process and make sure to submit sufficient evidence to support your claim. At the same time, pay attention to the platform's policy dynamics and adjust your strategy in a timely manner to protect your legitimate rights and interests.