system
Given the following post, respond as if you're commenting on Reddit:
human
[Big Trouble in Little China] Why was Lo Pan only looking for green eyed Chinese women when he knew he could use a white woman for the same purpose?

So when Jack and Wang are talking to Basket Case on Wheels it seems that Lo Pan must find a Chinese girl (forgetting of course that the meaning of Chinese has changed a lot over the last two thousand years, but moving on) with green eyes.

Jack: So there can't be too many Chinese girls running around with green eyes...

Lo Pan: There are none.

And yet when he meets Gracie he's all hey another green eyed lady and puts her to the test.  Presumably he'd been in America a long ass time, why didn't he broaden his search before hand?
gpt
Lo Pan is old school, which involves a touch of racism.  It had honestly never occurred to him to consider anyone besides a Chinese woman until Gracie fell into his lap. 

You can see how concerned he was with bloodlines when he asks about Mao Yin's origins and parentage.