I Can Upgrade in the End Times

The end of the world has come, and after a heavy rain, zombies are rampant on the earth!

After being reborn, Song Yan accidentally obtained a sign-in system, and has been making rapid progress ever since!

When people were afraid of the zombies, Song Yan took the lead and rushed into the zombie group!

When people were fighting for a hot weapon, Song Yan seized the armory!

When people were stunned, Song Yan had already become a legend!