1． Peel the skin and fat of the hen, then cut chicken into pieces, blanch in the boiling water for a short while. Dish out and drain well.
2． Soak preserved kohlrabi in the water for 20 minutes to reduce the saltiness, rinse and drain.
3． ln a soup pot, add water and bring to boil over high heat. Put in chicken, spare ribs, lotus root and the rest of ingredients.
4． Cover the lid, and bring back to boil. Reduce to low heat, cook for 3-4 hours, add seasoning, mix well. Serve hot.