Survival in the Apocalypse: Obtain a Large Shopping Mall at the Beginning

The biochemical crisis broke out and the world became a mess. Fortunately, I have the help of the system. I got a big shopping mall at the beginning, and I don't have to worry about food and drink from now on! Let's see how I can use the system to upgrade defense, recruit talents, and upgrade the shopping mall! Until one day, the plunderers finally found the location of the shopping mall, but they could only look up to the sky and sigh: This is not a shopping mall, it is clearly an invincible fortress!