Spicy Beef Stir-Fry

3 tablespoons Chinese Shaoxing rice wine, dry sherry or white vermouth

1 pound beef sirloin, thinly sliced against the grain into strips

Kosher salt and freshly ground pepper

2 tablespoons oyster sauce

2 teaspoons toasted sesame oil

3 to 4 tablespoons peanut oil

1 1-inch piece fresh ginger, thinly sliced

2 cloves garlic, smashed

5 to 7 dried red chiles, halved

1 small onion, thinly sliced

8 heads baby bok choy, halved

Pinch of sugar

Cooked rice, for serving