With a cleaver or heavy chef's knife, cut the chicken into large pieces. Then cut the chicken through bones into 2-inch pieces
In a large kettle of boiling water, blanch the chicken 1 minute
In a colander drain the chicken and rinse under cold water.
With the flat side of a cleaver or knife, lightly smash the ginger root and scallions.
In the cleaned kettle bring 10 cups of water to a boil with chicken, ginger root, scallions, rice wine or sherry
Then simmer, uncovered, skimming froth occasionally, for 2 hours
Pour the broth through a colander lined with triple thickness of cheesecloth into a large heatproof bowl, reserving chicken for another use.
The broth may be made 3 days ahead, cooled completely, uncovered, and chilled, covered.
In a cleaned kettle bring the broth to a boil.
Add the noodles and boil,
stirring occasionally, 2 minutes.
Stir in the spinach and simmer, stirring
once or twice,
until the spinach turns bright green and is just tender,
about 3 minutes.
Stir in the chives and salt and pepper to taste and simmer
1 minute.