Ni Lin, I Will Protect These Mountains and Rivers in the Name of a Traitor.

"They called me a traitor and nailed me to the pillar of shame. Ten years later, I returned with the enemy's army, not to destroy the country, but to protect it." The son of the framed marshal, who lurked in the enemy country for ten years, returned as a "traitor", and when the truth was revealed, he was already the leader of the world.