The Greek letter pronounced more like Kai. But, yes, the anglicized written form of the Greek letter looks like the anglicized written form of the Chinese leader’s name. And I agree, I’m sure it was skipped in the interest of not being antagonistic.
“Kai” (chi / χ) is a different Greek letter than “ksai” (xi / ξ).
Fair, but it still doesn't sound like the Chinese name ("shee")