The hardest food to swallow
Extreme viscous, creamy, or gelatinous challenge of the swallowing reflex

Medium
Old Beijing Bean Juice

Medium

Medium
Mosquito Burger

Hard
Chinese preserved egg
Peard egg: Its special flavor and color come from the decomposition and transformation of protein by strong alkali (plant ash/lime). This process produces a certain amount of ammonia and hydrogen sulfide, which emits an odor similar to "public toilet cleaner. The black egg white and dark green yolk also completely subvert the color that eggs "should" have.