I Panicked After Becoming Yang Guifei's Ex-Husband

Does Emperor Xuanzong of Tang know? I'm his son. Does Yang Guifei know? I'm her former husband's son. Li Mao never expected that, despite being single since birth, he would actually get a taste of being cheated on! He's a little panicked, though not because of the cuckold's hat. It's because the An Lushan Rebellion, which will bring the Tang dynasty from prosperity to decline, is about to break out... Theme: Prosperity, democracy, civility, harmony, freedom, and equality