Mix 1 egg white, 2 teaspoons cornstarch, ½ teaspoon salt, and ¼ teaspoon ginger in a bowl. Add 500 g chicken breast strips, toss until coated, and refrigerate for 30 minutes.
Heat 3 tablespoons oil in a wok or large frying pan over medium-high heat. Add chicken strips and fry, stirring frequently, for 8-10 minutes until cooked through (74°C / 165°F internal temperature). Keep stirring to prevent browning.
Transfer cooked chicken to a plate and cover with foil or a lid.