Checking how many tickets have been sold in the concert on the cat's eye can be divided into the following steps:

1. Download the Cat's Eye Movie app.

2. Open the cat's eye movie and find "mine" at the top right.

3. Enter "My" and click "Displaying".

4. In the page, select "Concert" to view the box office record of the concert.

It should be noted that the box office data may have a certain lag, so the figures you see may not be the latest.