Ashkenazi Jokes

An Ashkenazi orthodox rabbi was leading a service, and then the idea popped into his head that there might be Chinese Jews, with Chinese rabbis, with Chinese congregations.
So he goes all the way to China Town in San Francisco from New York to find out.
Sure enough, he comes across a small Chinese congregation with a Chinese rabbi.
He stares for a while. Finally, the rabbi walkes over to him and asks, "Are you Jewish?"
"Yes, why?" asks the Ashkenazi rabbi, somewhat puzzled.
"You don't look it."