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1
Place the pork belly cubes skin-side down in a dry clay pot over moderate heat. Render without moving until the skin is deep golden and has released a visible pool of fat — the skin will pull slightly from the pot and colour evenly.
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2
Add the dried chili and fermented black bean paste directly to the rendered fat. Stir briefly until the paste darkens and becomes fragrant — a deep, earthy smell with no raw-bean sharpness.
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3
Add the rice wine and soy sauce. Turn the pork to coat. Add the rock sugar, dried tangerine peel, and water to nearly cover. Bring to a low simmer — the surface should tremble, not boil hard.
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4
Cover the clay pot and braise over the lowest heat until the pork is completely tender throughout — a chopstick or skewer should meet no resistance when pressed into the thickest piece, and the braising liquid will have reduced to a glossy, darkened sauce.
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5
Taste the sauce for salt and depth. It should be assertively savoury, slightly spicy, and carry the rounded warmth of the clay pot. Adjust with a small measure of soy sauce if needed. Serve directly from the clay pot with steamed rice.