World Invasion: Cultivation

I've read transmigration novels, but they've never had too many people transferred at once. I want to change that by bringing an entire world and plop it over another. How would two technological time periods clash? How will they adapt to a magic/cultivation based world where technology is less than an after thought?

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=Rewriting In progress=
-=Progress 21%+Old World Lore and Prologue=-
(Each percent = Corresponding chapter number)
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Ip Cheng, an oriental man whose been away from his birth country since 8 finally returns at 19. He hasn't fully been separated from the culture though as he's read cultivation novels while away. He's come to reminisce a little about his past as well as take a break to enjoy his stay. Not long after though a quaking erupts from the earth as he loses consciousness. When he wakes up nothing seems different, until new land is suddenly discovered. It's almost like one of the transmigration novels he's read, but who is the protagonist? Normally it's just one person who's transferred, but what about now? Also Yanderes, multiple Yanderes, many Yanderes, just enough Yanderes.

Please tell me if you spot any errors or plot holes in my writing. That would be greatly appreciated, thank you.

Schedule:
I'm enjoying writing YSM more right now, possible resumption in the future.

P.S
This is my first time writing a novel and I'm doing this for fun.