I'm invincible since the end of the world

[Invincible and refreshing article] The apocalypse era 200 years later.
Lin Xinghai obtains the system, runs rampant in the apocalypse, and crushes all enemies.
Crushing is refreshing for a while, and it is refreshing to crush all the time.
Ding! Get blood power +1
Ding! Get gene optimization +1%
Ding! Get firearms skill mastery.