How Come You All Have a System for Cultivating Immortality in Another World?

[Cultivation of immortals + system + no heroine + multi-travelers raising Gu flow] Wen Xiang encountered a car accident and traveled across the Xuanfeng Continent. He started the system of cultivating immortals in other worlds. He thought he was the right one, but he found that he was not the only one who traveled through the world. There are all kinds of old people, Gou Mingliu, snipers, and chuunibyou in endlessly. The most terrifying thing is that they all have systems, such as simulators, urban miracle doctors systems, modern weapons systems, empress growth systems... Protagonist: "What?! Killing the system holder can devour the other party's system? Can you also upgrade your own system? I will kill every time traveler on sight!" Let's see how the protagonist battles wits and courage with many time-travelers and fights his way out.