Spine
1.
Soak the bones in advance, rinse them repeatedly, and rinse off the blood
2.
Pour cold water into the pot, add the above seasonings, and bring to a boil
3.
Add the old soup and heat slowly over medium-to-small heat.
4.
When it's 80% cooked, add dark soy sauce and salt
5.
Turn off the heat and soak for a while to taste. It is more powerful to prepare garlic sauce when eating.
Tips:
Do not put too much cloves. Without proper adjustment of so many seasonings, the old soup can be left alone, but the taste will be almost a bit.