Sour Fish Head Soup

• 2 scallions
• 1 fish head
• 1/2 sour bamboo (canned sliced)
• 950 ml water
• 950 ml water (boil)
• 20 ml fish sauce
• 20 ml fish sauce over the fish head
• 6 gr salt
• 3 gr mixed (chopped fresh)
• 3 gr salt