1. Players click "Home" in the lower right corner after entering the game, and click "Building" on the right after entering your home.

2. Find "Smart Card Slot" in the building list and click it to unlock it.

3. After unlocking, you can deploy in the Deployment interface.

Square-inch duel is a card game with ink painting style. In the game, players match cards, weapons and talents, duel with other players, and win by using the matching gameplay.