Slice the chicken into ¼-inch thick strips and transfer to a medium bowl. Add the soy sauce, cornstarch, Shaoxing cooking wine, garlic, ginger, and white pepper. Let this marinate for at least 40 minutes.
Heat a nonstick pan over medium-high heat. Add 1 tablespoon of oil. Add the chicken and cook for 2-3 minutes until no longer pink. Remove the chicken to a bowl, leaving the oil behind.
Reduce the heat to medium. Add the sliced Chinese sausages and cook for 1 minute until golden brown. Remove the sausages to a bowl and pour the leftover oil/fat into the clay pot. Add another tablespoon of oil to the clay pot. Set the clay pot aside.
Bring a medium pot of water to a boil. Add the salt and sesame oil. Add the gai lan stems and cook for 10 seconds. Add the leaves and cook for another 10 seconds. Rinse under cold water, drain, and set aside.
In a small bowl, whisk together the dark soy sauce, oyster sauce, and sugar until the sugar dissolves.
Now time to add everything to the clay pot. Rotate the clay pot to get the oil/fat all over the sides. Add the warm cooked rice and spread it evenly around the pot. Layer on the chicken, the Chinese sausage, and the gai lan.
Place the clay pot over medium-high heat for 1 minute. Reduce the heat to medium-low and cook for 10-15 minutes until the bottom is crispy. Pour the sauce mixture over the rice and enjoy!