I Became a Kindergarten Teacher for Monster Babies! - Chapter 46 Craft

Li Tianyan accidentally found himself in the Hengwu Continent as a Concubine’s son from a family of warriors. Not only did he lose all his cultivation, but he also became a waste bastard with five spiritual roots. Since the accident, Li Tianyan had an aunt and uncle who were eyeing him, and brothers who wanted him to fail. There was an ugly wife in the house who was married back.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Chen Xiangbei, a F1 driver, is reborn back to 2008, originally wanting to become a low-key high school student, but accidentally leads an entire era.【There are only cowardly people, not cowardly cars. If anyone is dissatisfied, shift to second gear, rev up to 7200, and go for it!】【Remember, when cornering on mountain roads, you must use the drainage ditch.】【No matter how fast the AE86 is, it can't catch up with the Benz that Natsuki sits in, but my Corolla can.】【Schumacher is indeed strong, but he's old. The future will be my era!】“If you're so amazing, why don't you go race in F1?”“I don't have money!”