Heat cooking oil to 325°F to 350°F (176°C to 190°C) in a deep fry pan. Fry pork shoulder strips in two batches. Use long chopsticks or tongs to drop pork strips one by one into the pan.
Quickly loosen up the meat and deep fry for 3 to 5 minutes or until golden brown on both sides. Dish out. Then, fry the second half of pork shoulder strips in the same manner.
Heat up the oil a little bit higher than before and drop all fried pork shoulder strips into the pot in one batch. Deep fry again for 10 seconds. Dish out with a strainer and transfer them to a plate lined with paper towels to absorb the excess oil.