'www.youtube.com/embed/cPLlQmgRRZE' Hong Kong is a city vibrant with energy, towering skyscrapers, and, perhaps most famously, incredible street food. As you navigate the bustling streets, maybe even riding the famous Mid-Levels Escalator (which the text mentions is surprisingly long, about 800m!), you're bound to encounter unique local delicacies. What is Gui Ling Gao? One such intriguing item, mentioned in the text, is 龜苓膏, or Gui Ling Gao. Often translated as "Turtle Shell Jelly" or simply…