Hidden Dragon and Phoenix

Don't use Qianlong? There is a phoenix coming to the instrument! The deposed Qi King's family failed in the fight for the throne and were demoted to common people. They met Shen Qiyin, a junior high school history teacher who traveled through time. The Prince of Qi who wants to regain the world? Take a lesson! Princess Qingchuan who wants to be the center of attention? Take a lesson! The Prince of Anyang who wants to share life and death? Fail! Repeat a grade! Remember the big mistake! I'll punish you to study for the rest of your life~