Place the chicken breasts in a crock pot.
Pour in soy sauce, hoisin sauce, rice wine vinegar, honey, sesame oil, garlic, and ginger.
Mix together and distribute evenly across chicken breasts, flipping the chicken breasts to cover with sauce.
Cover and cook on the low setting for 2-3 hours.
Take chicken breasts out of the crock pot, then shred the chicken using forks.
Warm a medium sized pot on the stovetop on medium heat.
Pour the rest of the sauce from the crockpot into the pot on the stovetop.
Once the sauce comes to a boil add the cornstarch and water.
Once the sauce is completely mixed, add the chicken into the pot.
Mix chicken with sauce for 5 minutes.
Once chicken is done, remove from pot.
Before serving, sprinkle scallions and sesame seeds over the chicken.