The specific steps to find the Mushroom Street app's Sweep are as follows:

1. First, open your cell phone, click on "Mushroom Street APP" on the cell phone page, and enter into the APP page.

2, then in the Mushroom Street shopping page, click on the top search bar behind the camera icon button.

3. Then click on the pop-up window to open the "Sweep", you can scan the QR code you want to scan.