Place the tenderloin in the freezer for 15 to 20 minutes. Remove from freezer, and then slice 1/2-inch medallions. Next, cut the medallions into 1/2-inch strips. If a strip is longer than 1 inch in length, slice in half. Put strips into a medium-sized bowl.
Add the wine and salt to the pork strips, mix well, cover with plastic wrap, and place in the fridge for 30 minutes.
For the sauce, combine the salt, sugar, vinegar, soy sauce, and cornstarch in a small-medium bowl.
Pour enough oil into your wok (or large sturdy pot, such as a Dutch oven) until it's about 1-inch deep. Heat over medium heat until it reaches 300°F. A candy thermometer helps with this.
In a medium-sized bowl, add the eggs and gently beat together. Add the corn starch and mix until completely mixed and a thick batter has formed.
Add the pork strips to the batter and mix until completely coated.
Drop some of the battered strips into the oil, adding them individually to prevent sticking, and stir with forks, or metal tongs, to separate.
Fry the strips for about 3 minutes, until they are just cooked through. Remove and drain on a plate lined with paper towels. Repeat with the remaining strips until you have cooked all of them.
Increase the heat until it reaches 375°F. Add the pork strips in one or two batches and deep-fry them until they are crisp and golden. Remove, drain, and place on a serving dish.
To prepare the sauce, either carefully discard the oil from the wok and then and wipe it clean with a towel, or use a second wok. Heat 3 tablespoons of oil over medium heat.
Add the garlic and ginger and stir-fry for about 30 seconds, until they are fragrant. Add the stock and bring to a boil. Add the prepared sauce from the small bowl.
Stir briskly as the liquid thickens, then add the scallions and sesame oil, stirring a few times.
Either pour the sauce over the pork strips, or add the pork strips to the sauce in the wok to coat and then transfer to a serving dish. Top with sliced scallions and toasted sesame seeds. Serve immediately with steamed rice or vegetables.