Bring a medium pot of water to boil, add in ginger slices and cooking wine.
Carefully cook the chicken breast under the boiling water for about 15 minutes, fish out the chicken, drain and wait for it to cool down.
Tear the chicken breasts to shreds.
Marinate the shredded chicken with olive oil, ketchup, salt and pepper for about 10 minutes.
Preheat the oven to 375 degrees F (190 degrees C), while waiting for the oven to heat, cover a sheet pan with tin foil and spread the chicken evenly on it.
Bake in preheated oven for 10 minutes and turn the chicken shreds, continue baking for another 8-10 minutes after turning.