In the years of famine, I was well versed in history and pampered the Northern Army

By chance, the orphan Chu Qingyin suddenly gained the ability to understand the past and present. "Host, believe me, I will definitely make us rich!" Chu Qingyin looked at the poor and desolate Zhenbei Army, starving to the point of eating tree bark, and the only legitimate son of the royal family, Lu Yan, who had a great reputation in his life, was exiled to the border to die. "Your Highness, am I seeing things? This is a pie in the sky!" With the help of Chu Qingyin, the Zhenbei Army was invincible all the way. When she was about to retire, she was stopped by Lu Yan: "Thank you for your kindness, witch, can I... promise to you?"...