Pour the pear juice into a large pot and add the sliced pears, cinnamon sticks, cloves, star anise, and orange slices.

Stir in the honey until it dissolves, then bring the mixture to a gentle simmer over medium heat.

Reduce the heat to low and let it cook for 20 minutes, stirring once or twice so the flavors blend evenly.

Remove the pot from the heat and strain the cider through a fine mesh strainer into a clean pitcher or serving bowl.

Ladle the warm cider into mugs and add a rosemary sprig to each one before serving.