Mix all sauce ingredients in a small bowl and set aside.
Heat a wok or large skillet over high heat; add the oil.
When the oil shimmers, add the shrimp. Stir constantly until shrimp is opaque and pink; about 5 minutes.
Add the onion, garlic and celery. Stir constantly until celery turns bright green, about 2 minutes. Stir the sauce again and add it to the pan, stirring constantly until it boils. Cook for 1 minute.