My Super Pet Dragon - Chapter 44

MC (female protagonist) dies in a plane crash and wakes up in the body of a beautiful but corrupt and lascivious prime minister in ancient times, Zhang Qinglian. As circumstances decree, he (she) cannot reveal that the original owner’s soul is gone else calamity might occur. So he (she) decides to walk a righteous path, determined to help the lovely but simple little emperor rule the country. Not backing down after facing torture, not losing courage, destroying rebellions and facing off with scheming princes.

The financial market is swept up and down, and the crocodiles are annihilated in chatting and laughing.

The most successful investor in history, the peak of the mysterious existence. He is Bridgewater’s largest investor, and his earnings beat Renaissance Technologies. He pointed to John Paulson, who strangled Long-Term Capital Management.

Killing a person in ten steps without leaving a name for a thousand miles, he is the son of finance and the king of hedging!

- Description from novelbuddy

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