How to exchange subway escape boxes on the black market?

1. First log in to the game and enter pubg subway escape mode.

2. Secondly, go to the escape shop in the black market in the lower right corner of the home page.

3. Then, click to open the black market, and you can see that the navigation bar on the right is the store.

Finally, change the cash box in the shop into cash, and then buy the equipment.