Singular auteur Pang Ho-cheung strikes again with his brilliant combination of uproarious lowbrow gags and insightful humanism, a Chinese New Year movie whose literal title is “Congratulations Bitches.” At its heart this freewheeling tale is about the profundity of true friendship, while on the surface it’s a wild sitcom built around a desperate scavenger hunt for breast milk. Replete with sexual hang ups, mean girl feuds and literal bathroom humor, nothing is sacred in Pang’s twisted but endearingly frank universe. So much so he even makes a cameo as a womanizer caught between a rock and a hard place.