How Do Immortals Know About Magic Technology?

As a descendant of the Zhang family in Beiting, they should have been prosperous, wealthy and well-fed. Not to mention that his sister is the most likely to become a martial arts master in the next generation. Even if you are born weak, you have no worries, life! Easy as a piece of cake! What does a witch appear from the north mean? What is the blood steam engine developed by Zhongyuan? War breaks out? Is the Zhang family coming to an end? Why? It turns out that I am a cultivator, so that's okay.