Have I Become the Tyrant's White Moonlight?

Ming Hanzhang traveled through time and became Yin Yao, the famous tyrant in history who brought peace to the troubled times and surrendered the four realms... The Bai Yueguang who died long ago. It is said that when Yin Jun was still a prince, he was neglected by the king and was sent to a wealthy family as a hostage, where he met Mr. Ming. That young master was so brilliant that he was a noble man, but he died on the eve of Yin Yao's ascension to the throne. For many years after that, he was the beacon hanging on the road ahead when Yin Yao pointed his sword at the world. —— When Ming Hanzhang traveled through time, Yin Yao had been in the Ming Mansion as a hostage for three years. He had a travel guide in his hand, with only one sentence written on it. [The day when the great cause is accomplished, the time when you return to your hometown with honor] Understand, just be Yin Jun's Bai Yueguang, wait for Yin Yao to gain momentum, and retreat with success! Ming Hanzhang was familiar with history books and determined to play the role of a handsome young man with a clear reputation in troubled times. It's just... How come that Zhi Ziyao, who was said to be "cared for deeply" by Mr. Ming, is now a horse slave whom Mr. Ming tramples on? —— Ming Hanzhang conscientiously acted according to historical records. He slept and ate with him, bandaged his wounds, taught him how to read and practice etiquette, and even Yin Yao personally kept him warm and detoxified every time a poisonous attack occurred on a full-moon night. But Yin Yao always looked at him with strange eyes. Later, Ming Hanzhang found out that those good words were all Mr. Ming's means of torturing Yin Yao! Whipping, torture, horse dragging... Even the poison Yin Yao was poisoned by was all done by Mr. Ming himself! Yin Yao hated him to the core. On the day he invaded Jinling City, he personally cut off Mr. Ming's head and made it into a lantern! Then he became Yin Yao's beacon... On the physical level. The great mission entrusted to him by the original owner was to kill Yin Yao to avenge himself! Ming Hanzhang: **, run! He packed his luggage overnight, hoping to save his life before Yin Yao seized power and ascended the throne. But later, the army pressed forward, and Yin Jun, who was bathed in blood, dismounted from his horse, stepped forward, and stepped into his carriage. Yin Yao's long sword dripped blood, and his paranoid and ruthless appearance overlapped with that of the tyrants in history books. Ming Hanzhang closed his eyes and waited for death, but the cold emperor's sword lifted his jaw. "Why did the young master abandon me?" "Young master and I are obviously very happy with each other." Intention: I want to be a good person this time