On this prawn noodles, there were five ingredients you can choose from: prawns, pork ribs, pig intestines, razor clams, pigs tail. Prices also vary according to the size of the prawns you choose. I like the sweetness of the soup, derived from both the prawns and pork ribs. I can appreciate the authenticity of the soup, though it was leaning towards being more "porky", and less "prawny".
But the best part is that you can dabao ngoh hiang guan chang from Lao Zhong Zhong opposite, and eat with the prawn noodles here. People have been doing it for years, and so far no complaints from the noodles owners :)