Danny is supposed to be spying on Madam Gau at her factory in China and the Bayonne Bridge between New Jersey and New York is shown several times in the background.
Zhou Cheng practices zui quan (drunken fist), a form of martial arts that requires co-ordination with the motions of drunkenness (swaying, staggering, and falling). In fiction many drunken fist fighters actually get drunk to use this style, but in reality this would be very dangerous and impractical to do.