In a large bowl, whisk together chili paste, sugar, golden mountain sauce, oyster sauce, egg, and evaporated milk. Whisk into a smooth, well-blended mixture.
Heat oil in a wok over low-medium heat. Toss in the garlic and yellow curry powder, stirring until fragrant, about 30 seconds.
Add the shrimp and squid, sizzle and occasionally flip until they're just cooked.
Add the mixture you made in step 1 and let it mingle with the seafood until the egg is set.
Stir in the harder vegetables first, like carrots and onions, and stir-fry until soft to your liking. Lastly, toss in the green onions, chilies, and celery. Turn off the heat and serve immediately with rice.