A pristinely clear fish broth from Xinyang, Henan, built on freshwater fish drawn from Nanwan Reservoir — a vast, spring-fed lake whose cold, mineral-rich waters yield fish of exceptional sweetness and zero muddy aftertaste.
Nanwan Reservoir, built between 1952 and 1955 in Shihe District southwest of Xinyang city, covers approximately 75 square kilometers of water surface and maintains Class III water quality year-round. The reservoir's upper catchment grows Xinyang Maojian — one of China's ten famous green teas — meaning the inflowing mountain streams run through pristine forest and tea garden before entering the lake cold and mineral-rich. Fish raised in such conditions accumulate none of the muddy geosmin compounds associated with stagnant lowland ponds. Clear-simmered Nanwan fish became a regional signature for precisely this reason: the lake's terroir is so distinctive that elaborate seasoning would conceal rather than enhance it.
A translucent, faintly golden broth of remarkable cleanness; the fish flesh flakes in broad, silky sheets with a sweetness that needs no enhancement; a whisper of ginger lifts rather than dominates.
Clear simmering targets a temperature of around 85 to 90 degrees Celsius — below a rolling boil — to prevent violent protein agitation. At this temperature, myosin and actin in the fish muscle begin to denature and set, releasing free amino acids (glutamate, alanine) and nucleotides (inosine monophosphate) into the broth, building umami and sweetness without clouding the liquid. Holding below a hard boil keeps protein molecules from fragmenting into fine particles that scatter light and turn the broth milky. Ginger's gingerol compounds bind with and neutralize the trimethylamine responsible for fishy odor.
Variations
Xinyang cooks sometimes add a small amount of local Maojian green tea leaves at the end for a subtle floral note echoing the lake's terroir; winter versions may include firm tofu and glass noodles simmered in the finished broth; a richer variant called milky-broth Nanwan fish uses high heat and generous lard to emulsify the fat into an opaque white broth.
On the Palate
Where Clear-Simmered Nanwan Lake Fish sits in the Chinese flavor cloud
Ingredients
Serves 4How it's made
6 steps · 15 min
- 15 min
Scale, gut, and rinse the fish; score the sides with 3 to 4 diagonal cuts down to the bone to aid heat penetration and flavor absorption.
- 23 min
Heat 1 tablespoon of oil in a clay pot or heavy saucepan; briefly pan-fry the fish over medium-high heat, about 90 seconds per side, just until the surface turns pale gold.
- 35 min
Add 1 litre of cold water, ginger slices, and scallion whites; bring to a gentle simmer over medium heat — do not allow a full rolling boil.
Watch outBring it only to a gentle simmer and never let it reach a rolling boil — a hard boil shatters the proteins into fine particles and turns the broth muddy instead of clear.
- 420 min
Reduce heat to low; simmer uncovered at around 85 to 90 degrees Celsius for 20 minutes, skimming any foam that rises in the first few minutes.
Watch outHold at eighty-five to ninety degrees twenty minutes, skimming the early foam — clean, sweet, clear broth comes from keeping it below a boil the whole way.
- 52 min
Season with salt to taste; the broth should be clear, sweet, and clean with no muddy aftertaste.
- 61 min
Ladle into a deep serving bowl; garnish with scallion greens and a thin slice of fresh ginger. Serve immediately with steamed rice.
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