Great Tang: Empress Wu Seizes My Throne, So I Serve Heaven and Pacify the Realm

Li Xian transmigrates as a crown prince, only to lose everything overnight.

And then...

His mother usurps the throne and forces him to marry into an enemy nation.

Li Xian endures hardship and steadily rises to power. One great accomplishment after another makes its way back to the palace, leaving the empress to live every day consumed by regret.

When mother and son meet again at Xuanwu Gate, the empress gazes at the brilliant son who should have been hers, tears streaming down her face.