Place the bones, the beef meat and the chicken in a large pan and add so much water that all is submersed. Add the table salt and let stand for 2 h
After 2 h, discard the water and clean the bones under running water
Place the bones, beef meat and chicken back in the pan and add one and 6/10 gallon (6 litre) of water. Mark or measure the liquid level
Warm the cumin and fennel seeds in a skillet and grind them in a mortar and pestle
Place the dried ginger, cloves, cinnamon stick, star-anise, ground fennel seeds and cumin seeds in a cheese cloth and close it with a rope and place in the pan
Put the pan on high fire. Remove scum continuously and when the water is boiling (roughly after 30 min) reduce the heat and let the broth simmer for 1 h. Continue to remove scum
After 1 h, add the sugar, the sea salt and the fish sauce and continue to simmer for another 2 h
After a total of 3 h simmering, remove the beef meat and cover with some broth. Let it cool down and reserve for the Pho dish
Bring the liquid level to the original level by adding water and place the lid on the pan. Let very slowly simmer for 7 hours or over night. The broth should hardly move.
After the 7 hours, carefully filtrate the broth through a clean cheesecloth and discard the herbs and all bones. Chicken meat can be reserved