One of the promo posters has Jet Li walking in a little alley in Chinatown in costume. It should be this picture here:
This picture is not taken on a set. This is a real street in San Francisco Chinatown, the Old Chinatown Lane between Clay st. and Washington st. However, they airbrushed out all the English lettered names. The yellow awning is "Utopia Cafe" on that street.
Feel free to come a visit when you can. The owner of that cafe has a picture of that poster up front. The food's good too. :D