During the opening period of the activity, in selected slots:

• Spin to hit a big/mega/super win and get a safe.
• You need to click the "open" button to let the safe enter the countdown. 
• Only one safe can be counting down at a time.
• After the safe countdown ends, you can open the safe and get coins.
• You can use Jades to open the safe instantly without waiting for the countdown.

You can only hold up to 4 safes at the same time.