Remove the shell of the geoduck. Remove the skin and wash thoroughly. Slice geoduck into very thin slices. Divide slices into soup bowls. Blanch bamboo shoots in boiling water briefly. Add to boiling supreme chicken broth and cook until tender. Add diced bitter squash and cook for 1 minute. Pour boiling broth into bowls containing the geoduck slices. Serve with the following garnishes and seasonings in small sauce bowls on the side for diners to adjust to taste: chopped green onions and cilantro; toasted sesame seeds, Chinese rice wine vinegar, light soy sauce; chili oil and chopped cucumber pickles.