This concept "water is thicker than blood" was a play on words of "blood is thicker than water." In the film Chinatown, there were characters that chose the money or the 'water business' over their own family, hence the symbolism that water is thicker than blood." the main character has a nose injury in the film and his injury is showed by him wearing a bandage. This symbolized the main character having humility, while still being somewhat of a hero.