First look at the upper left corner of the platform. If it is a simulated account, the words account number+simulated account will be displayed on it, and the real warehouse only has the account number. You can ask him to cut out the whole picture for you, or ask him to apply for QQ remote and open the platform for you to see.

The second is to let him show you the password, and you can go in and see it yourself. The identification method is the same as above.