I Transmigrated Back to the Modern Era and Teach Cultivation at a Kindergarten

Luo Yunfei was a modern young man from Blue Star. After an accident, he transmigrated to the Cultivation World. He had thought he could cultivate leisurely there, but after failing to overcome the tribulation to become a Deity, he ended up back in the modern era, where he gained a cheat-like cultivation System. The cultivation System told him a great calamity would strike Blue Star in three years. He had to bring the entire planet into the age of cultivation and build a kindergarten. The adorable children were experts in grammar, poetry, literature, and arithmetic, leaving everyone stunned.

Then one day, the children flew on their swords to rescue people and drive out ghosts.

Everyone: You call this a kindergarten? They're all flying on swords!