Reborn as the Princess' Knight (GL) - Chapter 7 A Thousand Gold.

Wen Er girl is unparalleled in beauty, but when people mention it, she has to sigh because she was born dumb. Unexpectedly, one day, the second girl Wen, who fell from the wall and hit Prince Jing’s body, suddenly spoke.

- Description from novelbuddy

Shen Yuan, a normal human who was living his life peacefully on earth died mysteriously, only to get reincarnated into the world of cultivation with an unknown bloodline so powerful that it even surpassed his chest system....“Hmm, looks like becoming an alchemist might be good. System, purchase the Alchemy knowledge.”[Ding!][Congratulations Host, for acquiring Heaven Refining Alchemy Sutra.]...Follow to see the journey of how Shen Yuan creates the strongest harem since the Primordial times to journey the three thousand world.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

In a distant future, Alexander wakes to a reality where his past is a fog and his consciousness inhabits a robot body. Faced with a fragmented memory and an uncertain future, he embarks on a quest for answers. Amidst the hum of his repair shop, where he scrapes by, he delves into the mystery of his transformation. As Alexander forges ahead, stitching together the threads of his identity, unexpected companions join his journey. Among them is a precocious girl whose presence sparks forgotten emotions, offering a glimpse of his lost humanity. Yet, in the shadows, lurk those drawn by his technological prowess, casting ominous shadows over his path. Caught between the pursuit of understanding and the threat of those who covet his abilities, Alexander confronts a pivotal question: will he succumb to adversity or emerge from the crucible stronger than before?