“Emperors”?
If you dont have any clue just dont say anything.
First, there were no Chinese han “emperors” with green eyes,there is just one king who get a green eye in our several thousand years long history.
And its definitely not the Han emperor,its the three-kingdoms era king who got the green eys, he is the king of one small kingdom, Wu at that time.
His name is Sun Quan, he is the second son of Sun Jian, the founder of Wu.
The reason why he has a green eye is because his mother is cacuasian, so he is a mixed blood, as the historical documents have well documented.
How else are you going to learn?
I don't usually respond to people with your attitude but, you seem to be particularly stupid.
Read this book by two professors: The Tarim Mummies