How to solve the pop-up window of oppo mobile phone in Pinduoduo?

I'm coming, I'm coming. As long as Pinduoduo's application notification is turned off, Pinduoduo's information will not pop up. I'm oppo k3. I hope my answer can help you. The operation is as follows:

1, open the phone settings, and click the notification and status bar.

2. Switch to a new page, and then click Notification Management.

3. Find Pinduoduo app and see that the button on the right is open.

4. Close the button.

These are just a few steps.