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"There is a traveler's backpack in the cave ahead, and there may be a surprise hidden in the backpack." "There is a hungry beast in the cave on the left. Trust me, you definitely don't want to face it." "The cave under your feet leads directly to the magma. If you want to take a hot bath in the fire, you can try digging."... When I wake up, billions of people around the world are in closed caves. You start with a shovel, and all resources depend on digging. However, there are not only resources in the cave, but also many terrifying monsters. No one can guarantee whether you will encounter resources or beasts after digging into the next cave. But Yu Cheng found that he could hear the notification sound. Know in advance what's in the next crypt. So, when others are still struggling in the boundary between life and death, struggling to survive in one bite. But Yu Cheng was already running around with a shovel, frantically searching for resources... Book club group: 820139048