In Underground Cave Survival, I Can Strengthen Items

All the people of the earth travel across the world, and everyone is scattered in a sealed cave. Every choice is an adventure. People's hearts are unpredictable, monsters are terrifying, and unpredictable dangers bring people endless despair. But Li Xin has a plug-in and a shovel to dig until the end of his life. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.