Cut ginger and garlic into small pieces or grind/crush. Mix together with sauces and vinegar.
Cut slashes into the chicken thighs.
Put everything into a plastic bag while making sure it's evenly coated and let it marinade for at least 12 hours, but ideally 24 hours. Turn it around every few hours.
Pre-heat oven to 180C with convection.
Place chicken in a single layer on a baking pan.
Bake for 40-50 minutes, but start checking after 35 minutes how dark it is.