EASY HAINANESE CHICKEN RICE

4 cups rice
5 cups water
1 1/2 kg chicken, preferably leg quarter part
1 tablespoon grated ginger
1 tablespoon grated garlic
1/4 cup patis
1 teaspoon salt
1-2 teaspoons chicken powder
Sauce:
1-2 cups grated ginger
Sesame oil
Plain oil
Salt, to taste
To serve:
Oyster sauce
Chili sauce
Spring onions