Heat vegetable oil in a well-heated pan or wok over medium-high heat.
Add garlic and sauté ~10 seconds; then add bell peppers and string beans, stir-frying ~50 seconds.
Drizzle in sesame oil and stir to coat vegetables.
Add cabbage, bird’s-eye pepper, and cooking wine; stir-fry 1 minute.
Gently fold in salmon, being careful not to over-break it.
Add chilled rice and soy sauce; stir-fry on high until heated through.
Remove from heat, garnish with scallions, and serve immediately.