Cut the chicken breast into bite-sized pieces.
Slice the onion and green onion into pieces that are easy to eat.
Boil water, add the chicken breast, blanch it, and then drain.
Heat oil in a pan and stir-fry the onion and green onion.
Add the blanched chicken breast to the pan and stir-fry.
Season with soy sauce, cooking wine, and pepper.
Place the stir-fried ingredients over rice and serve.