Lanzhou Beef Noodle Soup

Ingredients

• 2 lbs beef shank
• 1 large beef bone (marrow or knuckle)
• 10 cups water
• 2 tablespoons vegetable oil
• 1 large onion, quartered
• 5 cloves garlic, smashed
• 1 inch ginger, sliced
• 3 star anise
• 1 cinnamon stick
• 1 bay leaf
• 1 small piece of licorice root (optional)
• 1 teaspoon fennel seeds
• 1 teaspoon Sichuan peppercorns
• Salt, to taste
• 1 lb fresh or dried wheat noodles
• 4 baby bok choy, quartered
• 2 green onions, finely chopped
• 1 handful of cilantro, chopped
• Chili oil (optional)