King Pingxi of the Ming Dynasty

As a modern veteran and a descendant of a veteran of the Anti-Japanese War, he traveled back in time to the era when the Han family was in danger in the early 17th year of Chongzhen, and even to that infamous traitor ancestor. He would soon receive an edict from King Qin in a few months, but at this time, the fall of the Ming Dynasty was irreversible. Now, should he stand on his own, defect to the Manchus, surrender to the invaders, be loyal to the Ming Dynasty, or stand on his own? Even he himself doesn't know, and in this difficult world, he has also met modern colleagues who also traveled through the harem. How can the two of them work together to turn the tide and turn things around?