Heat oil in a medium skillet over low heat. Add ginger, and cook for 1 minute. Add wine, soy sauce, hoisin sauce, sugar, and star anise; bring to a simmer. Add pork, and cover. Cook until tender, 5 to 7 minutes per side. Remove pork, and keep warm. Allow sauce to simmer until reduced and thickened. Cut pork into 1-inch slices. Spoon sauce over pork, and serve with steamed rice and bok choy.
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