Cut the tofu into small cubes.

Place potato starch in a plastic bag, add the tofu cubes, and shake to coat evenly.

Heat a generous amount of cooking oil in a pan and fry the coated tofu until golden and crispy.

Drain the fried tofu on a paper towel to remove excess oil.

In a pan, mix soy sauce, sugar, corn syrup, vinegar, and water. Bring the sauce to a boil.

Add the fried tofu to the boiling sauce and mix well to coat.