I have to admit, Ying Zheng's move was truly vicious!
Just three days after the news of him becoming a disciple of Your Majesty the Emperor spread, the ruler of the State of Zhao among the six states led his people over to surrender. Not only did they surrender, but they also kept complaining the entire time that Ying Zheng was being unfair: since he had a master like Your Majesty the Emperor, why didn't he say so earlier?
If he had said so earlier, how could there have been any war at all!
Chapter 298