Killing System, Using Martial Arts to Achieve Enlightenment

[Invincible system + killing and cultivating immortals + wireless cool writing + decisive killing] Zhang Fugui failed to start a business and was heavily in debt. He was forced to commit suicide by his creditors. He accidentally traveled to a bizarre world of cultivation. He awakened the killing system and became stronger by killing enemies. He grew up from a border guard by killing all the way and gradually became an unparalleled powerhouse. He killed barbarians and resisted foreigners. He improved his cultivation through killing and achieved good results through killing. When I'm free, I have a beautiful woman in my arms; when I'm busy, I'm killing everyone, and I'm free in the world...