Marinate the chicken: Combine chicken pieces with soy sauce, oyster sauce, Shaoxing wine, garlic, and ginger. Let it sit for at least 30 minutes.
Rinse the rice thoroughly until the water runs clear to remove excess starch, which helps achieve fluffy rice.
Heat the clay pot over medium heat, add vegetable oil, and sauté the marinated chicken until browned, about 5-7 minutes.
Add the rinsed rice to the pot, stirring to coat with the oil and chicken juices.
Pour in the chicken broth, dark soy sauce, and sesame oil. Stir gently to combine.
Arrange the sliced Chinese sausage on top of the rice. Cover the pot and bring to a boil.
Once boiling, reduce heat to low and simmer for 25-30 minutes, or until the rice is cooked and has absorbed the liquid.
Turn off the heat and let the pot sit, covered, for an additional 10 minutes to allow the flavors to meld.
Fluff the rice with a fork, garnish with sliced green onions, and serve hot.