I've Already Become an Immortal, but I Can Still... History?

Xie Yanli traveled to the world of cultivation and became the genius son of the Qingyun Sect. He thought he was getting Long Aotian's script, but in the blink of an eye, he was demoted to a handyman and was looked down upon. When the sect was in danger, he silently spread out the drawings and said: "Sect Master, I have a plan that may be able to defeat the enemy." Everyone looked at the giant iron lump he designed named "Miss Qiu" and rebuked: "This is an evil heretic!" When 30,000 demonic troops pressed down on the territory, a "sun" rose from the bottom of the valley, and mushroom clouds washed away the world, the whole sect looked up and down at the lotus of destruction, with only one thought left: "Sir, great talent!... Wait, sir, calm down! What do you want to build next?!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.