Pinduoduo is the mainstream e-commerce application platform of domestic mobile Internet. The specific process of Pinduoduo's complaint is as follows:

1. Open the Pinduoduo app.

2. After entering the app, click the Personal Center option in the lower right corner.

3. Find the setting options in the Personal Center page and enter them.

4. Find feedback after entering the setting options, and click Enter.

5. On the feedback page, select the Service Complaint option.

6. On the service complaint page, you can select complaint types according to the options, such as service attitude of merchants, fraud, commodity problems, logistics problems, etc.

7. Click "Submit" after selecting, that is, the complaint is successful.