Man Starts a Shelter at the End of the World

The sun turned crimson one day, and scarlet acid rain fell crazily on the earth. Humanity was caught off guard and suffered heavy losses. The sky was broken and the earth was cracked. Zombie species were rampant. People struggled to survive. The young man had an invincible shelter. As long as he stayed in the shelter category and signed in every day, various rewards emerged one after another. Fighting monsters and upgrading slowly embarked on the road to the universe. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.